Acromegaly, 425
Actinotrocha, 438
Addison's disease, 423
Adelopthalmus, 249
Agnathostomatous fishes, 29, 343
Alimentary canal, 433
Alim"ntary c"nal, Ammocœtes, 168, 405, 445
Alim"ntary c"nal, invertebrate, compared to tube of central nervous system of vertebrate, 43, 433
Alim"ntary c"nal, innervation of, 447
Alim"ntary c"nal, origin of, 444
Alim"ntary c"nal, position of vertebrate and invertebrate, 10
Alim"ntary c"nal, possibility of formation of new, 58
Alim"ntary c"nal, relationship between notochord and, 434
Ammo"œtes, an ancestral type, 35, 309
Ammo"œtes, alimentary canal, 168, 405, 445
Ammo"œtes, auditory organ, 378, 379
Ammo"œtes, brain, 39, 40, 41, 45, 46, 48, 54, 61
Ammo"œtes, branchial appendages, 161, 162, 163, 164
Ammo"œtes, bra"chial basket-work, 126, 128, 296, 331, 335
Ammo"œtes, bra"chial chamber, 161, 168, 162, 163
Ammo"œtes, bra"chial circulation in Limulus and, 174
Ammo"œtes, bra"chial diaphragms, 161, 167
Ammo"œtes, bra"chial lamellæ, 175
Ammo"œtes, bra"chial muscles, 171
Ammo"œtes, bra"chial nerves, 164
Ammo"œtes, bra"chial segments, 178, 312
Ammo"œtes, cartilage, hard, 133, 133, 293, 294, 377
Ammo"œtes, cart"lage, muco, 130, 131, 291, 293, 294, 296, 330, 331, 333, 334, 335, 338
Ammo"œtes, cart"lage, soft, 129, 130, 293, 294, 296, 335
Ammo"œtes, degeneracy, evidence of, 59, 94, 343
Ammo"œtes, development, 228, 458
Ammo"œtes, epithelial cells of gills, 214
Ammo"œtes, epithelial cells of skin, 347
Ammo"œtes, epit"elial pits, 173, 200
Ammo"œtes, eye, 93
Ammo"œtes, e"e, muscles, 267
Ammo"œtes, e"e, median or pineal, 63, 75, 76, 77, 78, 80, 85, 86
Ammo"œtes, e"e, me"ian or pi"eal left, 78, 79
Ammo"œtes, fat-column, 181, 182
Ammo"œtes, f"t in degenerated muco-cartilage, 333, 334
Ammo"œtes, ganglia in embryo, 229, 283
Ammo"œtes, gland-tissue round the brain, 209, 210, 379
Ammo"œtes, head-region, 128, 162, 163, 193, 293, 294, 296, 298, 335
Ammo"œtes, head-shield, 329, 331, 338
Ammo"œtes, lymphatic glandular tissue, 426
Ammo"œtes, Müllerian fibres, 489
Ammo"œtes, muscles, eye, 173, 267
Ammo"œtes, mu"cles, lip, lower, 297
Ammo"œtes, mu"cles, li",| upper, 305
Ammo"œtes, mu"cles,| respiratory, 171
Ammo"œtes, mu"cles,| somatic, 332, 336, 409
Ammo"œtes, mu"cles,| tubular, 173, 298, 309
Ammo"œtes, nerves, cranial, 141
Ammo"œtes, ne"ves, facial, 186, 311
Ammo"œtes, ne"ves, glossopharyngeal, 186
Ammo"œtes, ne"ves, optic, 105
Ammo"œtes, ne"ves, trigeminal, 282, 288, 288
Ammo"œtes, ne"ves, vagus, 153, 173, 186
Ammo"œtes, nerve-fibres, medullation of, 20
Ammo"œtes, notochord, 182, 435
Ammo"œtes, olfactory tube, 219, 225, 227, 317
Ammo"œtes, oral chamber, 317, 243, 287, 458
Ammo"œtes, parasitism, 60, 286
Ammo"œtes, pituitary, 321
Ammo"œtes, prosomatic region, 243
Ammo"œtes, pronephric duct, 402, 405
Ammo"œtes, relationship to Ostracodermata, 326, 338, 344, 414, 416
Ammo"œtes, skin, 58, 346, 348, 442
Ammo"œtes, skeleton, 125, 126, 132, 291, 296, 335
Ammo"œtes, segments, comparison with segments of Eurypterus, 323
Ammo"œtes, segm"nts, facial, 201
Ammo"œtes, segm"nts, hyoid, 186, 201
Ammo"œtes, segm"nts, prosomatic, 286
Ammo"œtes, septa between myomeres, 416
Ammo"œtes, tentacles of upper lip, 303
Ammo"œtes, test, biological, to show relationship with Limulus, 493
Ammo"œtes, thyroid, 192, 194, 196, 205, 213, 430
Ammo"œtes, transformation, 18, 59, 125, 168, 193, 199, 200, 220, 227, 228, 287, 291, 304, 307, 309, 331, 336, 347, 349, 389, 445
Ammo"œtes, velum, 228, 289, 298, 302
Amœbocytes, 473
Amphi"xus, atrial cavity, 409
Amphi"xus, branchial nephric glands, 426
Amphi"xus, endostyle, 198, 212
Amphi"xus, excretory organs, 389, 395, 477
Amphi"xus, neuropore, 220, 457
Amphi"xus, notochord, 435, 436, 443
Amphi"xus, pleural folds, 495
Amphi"xus, septa between myomeres, 416
Amphi"xus, somatic muscles, 409
Amphi"xus, yolk, 485
Annelids, lateral sense-organs, 357, 367
Ann"lids, nephric organs, 390
Ann"lids, rigin of Arthropods from, 395
Ann"lids, parapodal ganglia, 283
Ann"lids, phagocytic glands, 421
Anthozoa, 474
Antibody, 492
Antitoxin, 492
Apparatus, auditory, 355
Appa"rtus, dioptric, 83
Appa"rtus, respiratory, 148
Appa"rtus, suctorial, of Petromyzon, 287
Appendages, branchial, of Ammocœtes, 161, 162, 163, 164
Appe"dages, bra"chial, of Limulus, 164
Appe"dages, bra"chial, of internal, 149
Appe"dages, derivation of suctorial apparatus of Petromyzon from, 290
Appe"dages, disappearance of, in transformation of Arthropod into Vertebrate, 386, 413
Appe"dages, evidence of, in prosomatic region of ancient fishes, 342
Appe"dages, muscles, in Limulus and Scorpion, 247
Appe"dages, prosomatic, of Gigantostraca, 234
Appe"dages, Trilobites, 351
Arac"nids, diverticula of stomach, 109
Arac"nids, lyriform organs, 364, 368
Arac"nids, segmental excretory organs, 423
Archæocytes, 473
Artemia, v. Branchipus
Arthropleura, 249
Arthropoda, arrangement of organs, 10
Arthr"poda, evolution, 11
Arthr"poda, excretory organs, 396, 418
Arthr"poda, giant-fibres, 489
Arthr"poda, musculature, 411
Arthr"poda, olfactory organs, 220
Arthr"poda, resemblance to ancient fishes, 29
Astacus, brain, 54
Ast"cus, digestive ferment in cells lining the carapace, 442
Ast"cus, optic chiasma, 101
Ast"cus, optic stalk, 91
Ast"cus, etina, 98
Atrium, 410
Auchenaspis (Thyestes), 30, 31, 75, 275, 326, 327, 328, 338
Auditory apparatus, 355
Auerbach, plexus of, 447
Aurelia, 475
Autonomic nerves, 3
Balanoglossus, 12, 12, 433, 438, 494
Bird, rhomboidal sinus, 46
Bladder, 449
Bla"der, swim, 148
Bl"od, circulation, in Ammocœtes and Limulus, 174
Bl"od, secretion of ductless glands into, 418
Bothriolepis, 29, 32, 239, 326, 351, 450
Brain, Ammocœtes and Arthropod, 54, 61
Br"in, and brain-case of Ammocœtes, 40, 41, 46, 209
Br"in, caudal, of Thelyphonus, 450
Br"in, epithelial lining of, 38
Br"in, roof, 39
Br"in, Sphæroma serratum, 62, 90
Br"in, Thelyphonus, 56
Br"in, ventricles, 4
Br"in, vesicles, 48
Branchial basket-work of Ammocœtes, 126, 128, 296, 331, 335
Branchipus, 28
Bran"hipus, eyes, lateral, 88
Bran"hipus, e"es, lat"ral, retina of, 91, 97
Bran"hipus, e"es, median, 75
Bran"hipus, excretory organs, 396
Bran"hipus, (Artemia) diverticula of gut and retinal ganglion, 110, 111, 113
Bran"hipus, nerves of appendages, 157
Bran"hipus, segmentation, 159
Bran"hipus, resemblance to Trilobite, 436
Bunodes, 24, 30, 249, 341, 351, 414
Bundles, posterior longitudinal, 489
Buthus, muscles, 270
Calcification in aponeuroses of Cephalaspis, 414
Calcifi"ation cartilage, 140,330
Calcifi"ation successive layers of the skin, 348
Camerostome, 221, 222, 223, 224, 241, 271
Canal, alimentary, formation of vertebrate, 58, 433, 446
Ca"al, alime"tary, innervation, 447
Ca"al, alime"tary, relationships between notochord and, 434
Ca"al, alime"tary, origin, 444
Ca"al, Haversian, 329
Ca"al, central, of spinal cord, 405, 439, 455
Ca"al, spinal, 182
Cartilage Ammocœtes, muco, 127, 130, 131, 200, 291, 303, 330, 333, 334, 344
Cart"ilge Ammo"œtes, hard, 133, 133, 377
Cart"ilge Ammo"œtes, soft, 126, 129, 130
Cart"ilge Ammo"œtes, spinal cartilages, 414
Cart"ilge Hypoctonus, 133, 142
Cart"ilge Limulus, hard, 142
Cart"ilge Lim"lus, muco, 139
Cart"ilge Lim"lus, soft, 20, 130, 137
Cart"ilge staining reactions, 131, 133, 139, 330, 336
Cai"ty, cœlomic, 167, 251, 266, 320, 389, 391, 408, 422, 430, 472
Cells, free-living, 463
Centre, vaso-motor, 468
Cephalaspis, diverticula of gut, 109
Ceph"laspis, eyes, lateral, 75, 275
Ceph"laspis, e"es, median, 75
Ceph"laspis, head-shield, 327, 328, 330, 338
Ceph"laspis, muscles on head-shield, 269
Ceph"laspis, resemblance to Ammocœtes, 145, 291, 326, 329, 338, 348, 414