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The zoology of the voyage of H.M.S. Beagle [vol. 1 of 5] cover

The zoology of the voyage of H.M.S. Beagle [vol. 1 of 5]

Chapter 2: LIST OF PLATES.
By Richard Owen
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About This Book

The work offers a geological introduction followed by systematic, anatomical descriptions of fossil mammals collected on the voyage, with emphasis on South American extinct forms. It details crania, jaws, teeth, vertebrae, limb bones, and tesselated armour for taxa such as Toxodon, Macrauchenia, Glossotherium, Mylodon, Scelidotherium, Megalonyx, and Megatherium, illustrated by numerous plates. Comparative morphology and measurements underpin taxonomic identifications and interpretations of structural relationships, and a brief discussion addresses the geological contemporaneity of the described extinct mammals.

LIST OF PLATES.

Plate I. Cranium of Toxodon Platensis, nat. size, basal view, with the sixth molar, right side upper jaw, and grinding surface of the seventh molar left side.
II. Cranium of Toxodon Platensis, side view.
III. Ditto, upper view.
IV. Ditto, back view, with two views of the sixth molar, right side, upper jaw.
V. Fragment of lower jaw, and teeth of Toxodon Platensis.
VI. Cervical vertebræ of the Macrauchenia Patachonica.
VII. Ditto, ditto, and of Auchenia Llama.
VIII. Lumbar vertebræ of the Macrauchenia Patachonica.
a. Medium convex articular surface joining the body of the sacrum.
b. b. Lateral concavities joining the transverse processes of the sacrum.
c. Ossified ligament of an anchylosed lumbar vertebra.
IX. Fig. 1 and 2. Fragments of the Scapula.
  Fig. 3. Distal end of the femur of Macrauchenia Patachonica.
X. Proximal ends of the anchylosed radius and ulna of Macrauchenia Patachonica.
XI. Bones of the right fore-foot, Macrauchenia Patachonica.
XII. Femur, Macrauchenia Patachonica.
XIII. Anchylosed tibia and fibula, Macrauchenia Patachonica.
XIV. Right astragalus, Macrauchenia Patachonica.
XV. Fig. 1. External metatarsal bone of the right hind-foot.
  Fig. 2. Proximal end of internal metacarpal bone, right fore-foot.
  Fig. 3 and 4. Proximal end of middle metacarpal bone.
  Fig. 5. Proximal end of external metacarpal bone, right fore-foot, Macrauchenia Patachonica.
XVI. Fragment of cranium of the Glossotherium.
  Fig. 1. Side view.
  Fig. 2. Base view.
  Fig. 3. Inside view, all half natural size.
  Fig. 4. Os tympanicum, natural size.
XVII. Fig. 1. Megalonyx Jeffersonii.
  Fig. 2. Megalonyx laqueatus.
  Fig. 3 and 4. Mylodon Harlani.
  Fig. 5. Mylodon Darwinii.
XVIII. Lower jaw of the Mylodon Darwinii.
XIX. Fig. 1. Side view of the lower jaw.
  Fig. 2 and 3. Last molar tooth.
  Fig. 4. Front view of the symphysis of the lower jaw, Mylodon Darwinii.
XX. Portion of the skeleton of the Scelidotherium leptocephalum.
XXI. Fig. 1. Side view of the cranium.
  Fig. 2. Back view of the cranium.
  Fig. 3, 4, and 5, anterior molar, upper jaw Scelidotherium.
XXII. Upper view of the cranium of the Scelidotherium.
XXIII. Fig. 1. Inside view of cranium.
  Fig. 2. Articular surface for the lower jaw.
  Fig. 3. Section of upper jaw and molar teeth.
  Fig. 4. Section of lower jaw and molar teeth, Scelidotherium.
XXIV. Cervical and anterior dorsal vertebræ of.
  Fig. 1. Scelidotherium.
  Fig. 2. Orycteropus.
  Fig. 3. Dasypus.
  Fig. 4. Myrmecophaga jubata; all one-third nat. size.
XXV. Fig. 1 and 2. Humerus, radius and ulna of Scelidotherium.
  Fig. 3. Head of humerus.
  Fig. 4. Head of radius.
  Fig. 5, 6, and 7. Femur of Scelidotherium.
XXVI. Fig. 1, 3, and 5. Astragalus of Megatherium.
  Fig. 2, 4, and 6. Astragalus of Scelidotherium.
XXVII. Fig. 1 and 2. Patella and head of tibia of Scelidotherium.
  Fig. 3, 4, and 5. Ungueal phalanx of Scelidotherium.
XXVIII. Fig. 1. Astragalus of Megatherium.
  Fig. 2. Astragalus of Scelidotherium.
  Fig. 3–6. Astragalus of Mylodon or Megalonyx.
XXIX. Lower jaw of Megalonyx Jeffersonii.
XXX. Fragment of the Cranium of Megatherium Cuvieri.
XXXI. Section of the upper jaw and teeth of the Megatherium Cuvieri.
XXXII. Fig. 1. Magnified view of structure of molar of Megatherium.
  Fig. 2–5. Ungueal phalanx and portions of tesselated armour of Hoplophorus euphractus.
  Fig. 6–11. Jaws and teeth of Ctenomys priscus.
  Fig. 12. Bones of right hind-foot of a Rodent.
  Fig. 13 and 14. Fossil tooth of a Horse.