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Artistic Anatomy of Animals

Chapter 2: PREFACE
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A practical manual for artists presenting comparative anatomy of animals to improve representation. It offers detailed descriptions of bones and joints (trunk, fore- and hind-limbs, and avian skull), the muscles of trunk, limbs and head, and the epidermal coverings of extremities, together with chapters on proportions and the paces of the horse. The text emphasizes careful observation, uses examples and reproduced sketches alongside diagrams and plates, and aims to complement human anatomical study by clarifying structural variations, mechanics of movement, and proportional principles useful for accurate artistic depiction.

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Title: Artistic Anatomy of Animals

Author: Édouard Cuyer

Release date: December 15, 2011 [eBook #38315]
Most recently updated: January 8, 2021

Language: English

Credits: Produced by Chris Curnow, Harry Lamé and the Online
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Please see Transcriber's Notes at the end of this document.

THE
ARTISTIC ANATOMY OF ANIMALS



PREFACE

A few lines will suffice to explain why we have compiled the present volume, to what wants it responds, and what its sphere of usefulness may possibly embrace.

In our teaching of plastic anatomy, especially at the École des Beaux-Arts—where, for the past nine years, we have had the very great honour of supplementing the teaching of our distinguished master, Mathias Duval, after having been prosector for his course of lectures since 1881—it is our practice to give, as a complement to the study of human anatomy, a certain number of lessons on the anatomy of those animals which artists might be called on to represent.

Now, we were given to understand that the subject treated in our lectures interested our hearers, so much so that we were not surprised to learn that a certain number repeatedly expressed a desire to see these lectures united in book form.

To us this idea was not new; for many years the work in question had been in course of preparation, and we had collected materials for it, with the object of filling up a void of which the existence was to be regretted. But our many engagements prevented us from executing our project as early as we would have wished. It is this work which we publish to-day.

[vi]

Putting aside for a moment the wish expressed by our hearers, we feel ourselves in duty bound to inquire whether the utility of this publication is self-evident. Let it be clearly understood that we wish to express here our opinion on this subject, while putting aside every personal sentiment of an author.

No one now disputes the value of anatomical studies made in view of carrying out the artistic representation of man. Nevertheless—for we must provide against all contingencies—the conviction on this subject may be more or less absolute; and yet it must possess this character in an intense degree in order that these studies may be profitable, and permit the attainment of the goal which is proposed in undertaking them. It is in this way that we ever strive to train the students whose studies we direct; not only to admit the value of these studies, but to be materially and deeply convinced of the fact without any restriction. Such is the sentiment which we endeavour to create and vigorously encourage. And we may be permitted to add that we have often been successful in this direction.

Therefore it is that, at the beginning of our lectures, and in anticipation of possible objections, we are accustomed to take up the question of the utility of plastic anatomy. And in so doing, it is in order to combat at the outset the idea—as mischievous as it is false—which is sometimes imprudently enunciated, that the possession of scientific knowledge is likely to tarnish the purity and freshness of the impressions received by the artist, and to place shackles on the emotional sincerity of their representation.

[viii]

It is chiefly by employment of examples that we approach the subject. These strike the imagination of the student more forcibly, and the presentation of models of a certain choice, although rough in execution, is, in our opinion, preferable to considerations of an order possibly more exalted, but of a character less clearly practical. Let us, then, ask the question: Those artists whose eminence nobody would dare to question, did they study anatomy? If the answer be in the affirmative, we surely cannot permit ourselves to believe that we can dispense with a similar course. And, as proof of the studies of this class which the masters have made, we may cite Raphael, Michelangelo, and, above all, Leonardo da Vinci; and, of the moderns, Géricault. And we may more clearly define these proofs by an examination of the reproductions of their anatomical works, chosen from certain of their special writings.[1]

[1] Mathias Duval and A. Bical, ‘L’anatomie des Maîtres.’ Thirty plates reproduced from the originals of Leonardo da Vinci, Michelangelo, Raphael, Géricault, etc., with letterpress and a history of plastic anatomy, Paris, 1890.

The manuscripts of Leonardo da Vinci of the Royal Library, Windsor, ‘Anatomy, Foliæ A.,’ published by Théodore Sabachnikoff, with a French translation, written and annotated by Giovanni Piumati, with an introduction by Mathias Duval. Édouard Rouveyre, publisher, Paris, 1898.

Mathias Duval and Édouard Cuyer, ‘History of Plastic Anatomy: The Masters, their Books, and Anatomical Figures’ (Library of Instruction of the School of Fine Arts), Paris, 1898.

Accordingly, there is no scope for serious discussion, and it only remains for us to enunciate the opinion that it is necessary that we should imitate those masters, and, with a sense of respectful discipline, follow their example.

Here, with regard to the anatomy of animals, we pursue the same method, and the example chosen shall be that of Barye. His talent is too far above all criticism to allow that this example should be refused. The admiration which the works of this great artist elicit is too wide-spread for us to remain uninfluenced by the lessons furnished by his studies. It is sufficient to see the sketches relating to these studies, and his admirable casts from nature which form part of the anatomical museum of the École des Beaux-Arts, to be convinced that the artistic temperament, of which Barye was one of the most brilliant examples, has nothing to lose by its association with researches the precision of which might seem likely to check its complete expansion.

[x]

In those sketches we find proofs of observation so scrupulous that we cannot restrain our admiration for the man whose ardent imagination was voluntarily subjected to the toil of study so profound.

If the example of Barye, with whom we associate the names of other great modern painters of animals, can determine the conviction which we seek to produce, we shall be sincerely glad. To contribute to the propagation of useful ideas, and to see them accepted, gives a feeling of satisfaction far too legitimate for us to hesitate to say what we should feel if our hope be realized in this instance.

ÉDOUARD CUYER.

[xii]


CONTENTS

INTRODUCTION
  PAGE
GENERALITIES OF COMPARATIVE ANATOMY 1
CHAPTER I
OSTEOLOGY AND ARTHROLOGY:
  THE TRUNK 4
  THE POSTERIOR LIMBS 78
  THE POSTERIOR LIMBS IN SOME ANIMALS 90
  THE SKULL OF BIRDS 127
CHAPTER II
MYOLOGY:
  THE MUSCLES OF THE TRUNK 131
  MUSCLES OF THE ANTERIOR LIMBS 162
  MUSCLES OF THE POSTERIOR LIMBS 200
  MUSCLES OF THE HEAD 232
CHAPTER III
EPIDERMIC PRODUCTS OF THE EXTREMITIES OF THE FORE AND HIND LIMBS 247
CHAPTER IV
PROPORTIONS
  PROPORTIONS OF THE HEAD OF THE HORSE 273
CHAPTER V
THE PACES OF THE HORSE 282


LIST OF ILLUSTRATIONS

FIG.   PAGE
1. A Human Skeleton in the Attitude of a Quadruped, To give a General Idea of the Position of the Bones in other Vertebrates 5
2. Size of the Atlas compared with the Transverse Dimensions of the Corresponding Parts of the Skull in Man 7
3. Size of the Atlas compared with the Transverse Dimensions of the Corresponding Regions of the Skull in a Dog 8
4. Lumbar Vertebræ of a Quadruped (the Horse): Superior Surface 9
5. A Transverse Section of the Thorax of a Man placed Vertically—that is to say, in the Direction which it would assume in a Man placed in the Attitude of a Quadruped (a Diagrammatic Figure) 13
6. A Vertical Section of the Thorax of a Quadruped (Diagrammatic) 14
7. Sternum of a Bird (the Cock): Left Side, External Surface 17
8. Anterior Limb of the Bat: Left Side, Anterior Surface 20
9. Anterior Limb of the Seal: Left Side, External Surface 21
10. Situation and Direction of the Scapula in the Human Being, the Trunk being Horizontal, as in Quadrupeds. Vertical and Transverse Section of the Thorax (Diagrammatic Figure) 22
11. Position and Direction of the Scapula in Quadrupeds. Vertical and Transverse Section of the Thorax (Diagrammatic Figure) 22
12. Left Scapula of the Human Being, Posterior Surface, placed in the Position which it would Occupy in the Skeleton of a Quadruped 23
13. Left Scapula of a Horse: External Surface 23
14. Vertical and Transverse Section, at the Site of the Shoulders, of the Thorax of the Horse (Diagrammatic Figure) 24
15. Vertical and Transverse Section, at the Plane of the Shoulders, of the Thorax of the Dog (Diagrammatic Figure) 24
16. Left Clavicle of the Cat: Superior Surface (Natural Size) 26
17. Clavicle of the Dog (Natural Size) 26
18. Skeleton of the Shoulder of a Bird (Vulture): Antero-External View of the Left Side 27
19. Inferior Extremity of the Left Humerus of a Felidæ (Lion) 31
20. Inferior Extremity of the Left Human Humerus, showing the Presence of a Supratrochlear Process 31
21. Skeleton of a Bird (Vulture): Left Surface 33
22. The Human Hand resting for its Whole Extent on its Palmar Surface: Left Side, External Surface 35
23. The Human Hand resting on its Phalanges: Left Side, External Surface 36
24. The Human Hand resting on the Tips of some of its Third Phalanges: Left Side, External View 36
25. Superior Extremity of the Bones of the Human Forearm: Left Side, Superior Surface 39
26. Superior Extremity of the Bones of the Forearm of a Dog: Left Limb, Superior Surface 39
27. Superior Extremity of the Bones of the Forearm of the Horse: Left Limb, Superior Surface 40
28. Inferior Extremity of the Bones of the Forearm of a Man: Left Side, Posterior Surface, Position of Supination 41
29. Inferior Extremity of the Bones of the Forearm of a Dog: Left Side, Anterior Surface, Normal Position—that is, the Position of Pronation 41
30. Inferior Extremity of the Bone of the Forearm of the Horse: Left Side, Anterior Surface 42
31. Skeleton of the Superior Limb of a Bird (Vulture): Left Side, External Surface 47
32. Superior Limb of the Human Being, the Different Segments being placed in the Attitude which the Corresponding Parts occupy in Birds: Left Side, External Surface 48
33. Skeleton of the Bear: Left Lateral Surface 50
34. Skeleton of the Dog: Left Lateral Surface 52
35. Scapula of the Dog: Left Side, External Surface 53
36. Left Scapula of the Cat: External Surface 53
37. Skeleton of the Finger of a Felide (Lion): Left Side, Internal Surface 57
38. Skeleton of the Pig: Left Lateral Surface 58
39. Skeleton of the Ox: Left Lateral Surface 61
40. Skeleton of the Horse: Left Lateral Surface 64
41. Flexion of the Humerus: Right Anterior Limb of the Horse, External Surface (after a Chromophotographic Study by Professor Marey) 74
42. Extension of the Humerus: Right Anterior Limb of the Horse, External Surface (after a Chromophotographic Study by Professor Marey) 74
43. The Left Iliac Bone of the Human Being: External Surface, placed in the Position which it would occupy in the Skeleton of a Quadruped 79
44. Left Iliac Bone of a Quadruped (Horse): External Surface 79
45. Pubic Region of the Pelvis of a Marsupial (Phalanger, Fox) 81
46. Pelvis of a Bird (the Cock): External Surface, Left Side 82
47. Posterior Limb of the Horse placed in the Position which it should occupy if the Animal Were a Plantigrade: Left Limb, External Surface 89
48. Skeleton of the Foot of a Bird (the Cock): Left Side, External Surface 90
49. Pelvis of the Dog, seen from Above 91
50. Pelvis of a Felide (Lion), viewed from Above 92
51. Pelvis of the Ox: Superior Surface 95
52. Tarsus of the Ox: Posterior Left Limb, Antero-external Surface 97
53. Pelvis of the Horse: Superior Surface 101
54. Tarsus of the Horse: Left Posterior Limb, Anterior Surface 104
55. Extension of the Leg: Right Posterior Limb of the Horse, External Surface (after a Chronographic Study by Professor Marey) 107
56. Human Skull: Measure of the Facial Angle by the Method of Camper. Angle BAC = 80° 110
57. Skull of the Horse: Measure of the Facial Angle by the Method of Camper. Angle BAC = 13° 110
58. Skull of one of the Felidæ (Jaguar): Left Lateral Aspect 113
59. Skull of the Lion: Left Lateral Aspect 113
60. Skull of the Dog: Left Lateral Aspect 115
61. Skull of the Pig: Left Lateral Aspect 117
62. Skull of the Ox: Left Lateral Aspect 119
63. Skull of the Horse: Left Lateral Aspect 121
64. Skull of the Hare: Left Lateral Aspect 123
65. Skull of the Cock: Left Lateral Surface 128
66. Myology of the Horse: Anterior Aspect of the Trunk 132
67. Myology of the Horse: Inferior Aspect of the Trunk 135
68. Myology of the Dog: Superficial Layer of Muscles 141
69. Myology of the Ox: Superficial Layer of Muscles 143
70. Myology of the Horse: Superficial Layer of Muscles 146
71. Myology of the Horse: Panniculus Muscle of the Trunk 148
72. Myology of the Horse—Shoulder and Arm: Left Side, External Surface 166
73. Myology of the Dog: Left Anterior Limb, External Aspect 178
74. Myology of the Ox: Left Anterior Limb, External Aspect 180
75. Myology of the Horse: Left Anterior Limb, External Aspect 182
76. Myology of the Dog: Left Anterior Limb, Internal Aspect 190
77. Myology of the Horse: Anterior Limb, Left Side, Internal Aspect 192
78. Left Anterior Limb of the Horse: Internal Aspect 194
79. Left Anterior Limb of the Horse: External Aspect 196
80. Left Anterior Limb of the Horse: External Aspect 196
81. Diagram of the Posterior Part of a Transverse Section passing through the Middle of the Left Fore-limb of the Dog: Surface of the Inferior Segment of the Section 198
82. Diagram of a Horizontal Section of the Middle of the Forearm of the Left Leg of the Horse: Surface of the Interior Segment of the Section 198
83. Myology of the Horse: the Anterior Tibial Muscle (Flexor of the Metatarsus), Left Leg, Anterior View 214
84. Myology of the Dog: Left Hind-limb, External Aspect 216
85. Myology of the Ox: Left Leg, External Aspect 218
86. Myology of the Horse: Left Hind-limb, External Aspect 220
87. Myology of the Dog: Left Hind-limb, Internal Aspect 222
88. Myology of the Horse: Left Hind-leg, Internal Aspect 223
89. Myology of the Dog: Masticatory Muscles (a Deeper Dissection than that shown in Fig. 90) 233
90. Myology of the Dog: Muscles of the Head 235
91. Myology of the Ox: Muscles of the Head 237
92. Myology of the Horse: Muscles of the Head 239
93. Claw of the Dog: Inferior Surface 249
94. Left Hand of the Dog: Inferior Surface, Plantar Tubercles 249
95. Vertical Antero-posterior Section of the Foot of a Horse 250
96. Third Phalanx of the Horse: Left Anterior Limb, External Surface 251
97. Left Anterior Foot of the Horse: Anterior Aspect 253
98. Left Anterior Foot of the Horse: External Aspect 254
99. Vertical and Transverse Section of a Left Human Foot: Outline of the Surface of the Posterior Segment of this Section (Diagrammatic Figure) 255
100. Inferior Surface of a Fore-hoof of the Horse: Left Side 256
101. Third Phalanx of the Horse: Left Anterior Limb, Inferior View 257
102. Third Phalanx of the Horse: Left Posterior Limb, Inferior View 257
103. Inferior Surface of a Hind-hoof of a Horse: Left Side 258
104. Left Posterior Foot of a Horse: External Aspect 259
105. Foot of the Ox: Left Side, Antero-external View 260
106. The Proportions of the Horse (after Bourgelat) 265
107. Proportions of the Horse (after Colonel Duhousset) 270
108. Proportions of the Head of the Horse, viewed in Profile (after Colonel Duhousset) 274
109. The Same Design as that of Fig. 108, on which we have indicated, by Similar Lines, the Principal Corresponding Measurements 275
110. Proportions of the Head of the Horse, seen from the Front (after Colonel Duhousset) 276
111. The Same Figure as Fig. 110, on which we have marked, by Similar Lines, the Principal Measurements which correspond thereto 277
112. Horse of which the Length contains more than Two and a Half Times that of the Head, and of which this Dimension (A, B) exceeds the Height 279
113. Horse of which the Length contains more than Two and a Half Times that of the Head, and of which this Dimension (A, B) exceeds the Height 280
114. Horse of which the Length contains more than Two and a Half Times that of the Head, and of which this Dimension (A, B) is Inferior to the Height 281
115. Experimental Shoes, intended to Record the Pressure of the Foot on the Ground 284
116. Runner furnished with the Exploratory and Registering Apparatus of the Various Paces 285
117. Tracing of the Running of a Man (after Professor Marey) 286
118. Notation of a Tracing of the Running of a Man (after Professor Marey) 287
119. Notation of Various Modes of Progression of a Man (after Professor Marey) 287
120. Swing of the Raised Anterior Limb (after G. Colin) 289
121. Swing of the Anterior Limb on the Point of Pressure (after G. Colin) 290
122. Posterior Limb, giving the Impulse (after G. Colin) 291
123. Notation of the Ambling Gait in the Horse (after Professor Marey) 292
124. The Amble: Right Lateral Pressure 293
125. Notation of the Gait of the Trot in a Horse (after Professor Marey) 294
126. The Trot: Right Diagonal Pressure 295
127. The Trot: Time of Suspension 295
128. Notation of the Pace of Stepping in the Horse (after Professor Marey) 296
129. The Step: Right Lateral Pressure 297
130. The Step: Right Diagonal Pressure 297
131. The Gallop: First Period 298
132. The Gallop: Second Period 298
133. The Gallop: Third Period 299
134. The Gallop: Time of Suspension 299
135. Notation of the Gallop divided into Three Periods of Time (after Professor Marey) 300
136. Notation of the Gallop of Four Periods in the Horse (after Professor Marey) 300
137. Leap of the Hare (after G. Colin) 301
138. The Leap 302
139. The Leap 302
140. The Leap 303
141. The Leap 303
142. The Leap 305
143. The Leap 305

THE ARTISTIC ANATOMY OF ANIMALS

INTRODUCTION

GENERALITIES OF COMPARATIVE ANATOMY

Of the animals by which we are surrounded, there are some which, occupying a place in our lives by reason of their natural endowments, are frequently represented in the works of artists—either as accompanying man in his work or in his amusements, or as intended to occupy the whole interest of the composition.

The necessity of knowing, from an artistic point of view, the structure of the human body makes clear the importance we attach, from the same point of view, to the study of the anatomy of animals—that is, the study of comparative anatomy. The name employed to designate this branch of anatomy shows that the object of this science is the study of the relative position and form which each region presents in all organized beings, taking for comparison the corresponding regions in man. The head in animals compared with the human head; the trunk and limbs compared to the trunk and limbs of the human being—this is the analysis we undertake, and the plan of the subject we are about to commence.

Our intention being, as we have just said, the comparison of the structure of animals with that of man, should we describe the anatomy of the human being in the pages which follow? We do not think so. Plastic human anatomy having been previously studied in special works,[2] we take it for granted that these have been studied before undertaking the subject of comparative anatomy. We will therefore not occupy time with the elementary facts relative to the skeleton and the superficial layer of muscles. We will not dilate on the division of the bones into long, short, large, single, paired, etc. All these preliminary elements we shall suppose to have been already studied.

This being granted, it is, nevertheless, necessary to take a rapid bird’s-eye view of organized beings, and to recall the terms used in their classification.

Animals are primarily classed in great divisions, based on the general characters which differentiate them most. These divisions, or branches, allow of their being so grouped that in each of them we find united the individuals whose general structure is uniform; and under the name of vertebrates are included man and the animals with which our studies will be occupied. The vertebrates, as the name indicates, are recognised by the presence of an interior skeleton formed by a central axis, the vertebral column, round which the other parts of the skeleton are arranged.

The vertebrate branch is divided into classes: fishes, amphibians or batrachians, reptiles, birds, and mammals.

The mammals—from the Latin mamma, a breast—are characterized by the presence of breasts designed for the alimentation of their young. Their bodies are covered with hair, hence the name pilifères proposed by Blainville; and, notwithstanding that in some individuals the hairs are few, the character is sufficient to distinguish them from all other vertebrates.

We find united in this class animals which, at first, seem out of place, such as the whale and the bat; and, from their external appearance alone, the former would appear to belong to the fishes, and the latter to birds. Yet, on studying their structure, we find that, not only do these animals merit a place in the class which they occupy, because they possess the distinctive characters of mammals; but, still further, their internal structure is analogous to that of man and of the other individuals of this class.

Notwithstanding this similarity of structure, the whale is not without some points of difference from its neighbours the horse and the dog; therefore, in order to place each of these animals in a position suitable to it, mammals are divided into secondary groups called orders. The first of these orders includes, under the name primates, man and apes. The latter contain animals which approach birds in certain characters of their organism, forming a link between the latter and mammals.

We find, in studying the regions of the body in some of the vertebrates, that, while they present differences from the corresponding regions of the human body, they also offer most striking analogies. We can, for example, recognise the upper limb of man in the anterior one of quadrupeds, in the wing of the bat, in the paddle of the seal, etc. It is, so to speak, those variations of a great plan which give such a charm to the study of comparative anatomy.

The division of classes into orders, which we have just mentioned, being still too general, it was found necessary to establish subdivisions—more and more specialized—to which the names families, genera, species, and varieties were given.