INDEX. 



627 



ganglia, 256; Visceral nervous sys- 

 tem, 259 ; Eye, 265 ; Enteric canal, 

 269; Salivary glands, 273; Liver, 

 275; Malpighiau vessels, 276; Cir- 

 culatory system, 281 ; Tracheae, 290 ; 

 Germ glands, 292; Generative organs, 

 296 ; Seminal elements, 301. 



Aranea — Gnathites, 244 ; Caeca, 269 ; 

 Hind-gut, 270; Salivary glands, 273; 

 Hepatic tubes, 278 ; Circulatory sys- 

 tem, 281; Trachea), 290; Copulatory 

 organs, 299. 



Area — Byssus gland, 329 ; Visceral gang- 

 lia, 346 ; Visual organs, 353. 



Ai-cella — Supporting organs, 81 ; Tests, 

 83 ; Contractile vesicles, 86. 



Archegosauria — Dermal bones, 425. 



Ardea — Enteric canal, 565. 



Arenicola — Appendages, 136 ; Auditory 

 organs, 156 ; Fore-gut, 163 ; Hind- 

 gut, 163 ; Vascular system, 169 ; 

 Central organs of blood-vascular 

 system, 169. 



Argiope — Figure of larva of, 307. 



Argonauta — Hectocotylised arm, 327; 

 Shell, 335 ; Liver, 366. 



Argulus — Caeca, 268. 



Argyroneta — Trachea?, 290. 



Aricia — Dermal glands, 141. 



Artemia— Eye, 265 ; Heart, 280. 



Arthropoda — Connective tissue, 24 ; Tests, 

 38 ; Muscles, 40 ; Nervous system, 

 42; Vascular system, 50; Homo- 

 dynamy in, 64 ; General review, 

 228; Classification, 229; Biblio- 

 graphy, 232 ; Appendages, 237 ; 

 Integument, 248 ; Muscular system, 

 252 ; Cephalic ganglion, 252 ; Ventral 

 ganglionic chain, 252 ; (^Esophageal 

 ring, 252 ; Peripheral nervous system, 

 252 ; Visceral nervous system, 259 ; 

 Visual organs, 263 ; Alimentary 

 canal, 267 ; Salivary glands, 273 ; 

 Ccelom of, 278; Fat bodies, 278; 

 Vascular system, 279 ; Dorsal trunk, 

 279 ; Venous ostia, 279 ; Pericardial 

 sinus, 279 ; Blood-fluid, 280 ; Gener- 

 ative organs, 291 ; Germ glands, 292. 



Arthrostraca — Auditory vesicles, 261 ; 

 Salivary glands, 274. 



Artiodactyla — Dorso-lumbar vertebrae, 

 437 ; Fore-limb, 483 ; Pelvis, 486. 



Ascalabotao — Eyelid, 532. 



Ascaris — Muscular fibres, 144; Female 

 organs, 184. 



Ascidiae — Form of body, 390 ; Muscular 

 system, 395; Median dorsal nerve- 

 chord, 396 ; Peripheral nerves, 397 ; 

 Branchial sac, 400 ; Heart, 401 ; 

 Languets, 401 ; Branchial slits of, 

 402 ; Ventral groove, 403 ; Enteron, 

 404 ; Sexual organs, 407. 

 Ascones — Gastrula of, 93. 

 Asellus — Renal concretions, 278. 



Asiphonia — Respiratory cavity, 319. 



Aspidisca — Carapace, 83. 



Aspidogaster— Pharynx, 158. 



Astacus — Respiration in, 269. 



Asteracanthion — Arms, 195, 199; Am. 

 bulacral feet, 195. 



Asterida — Nervous system, 208 ; Visual 

 organs, 210 ; Alimentary canal, 213 ; 

 Ccelom, 217 ; Blood - vessels, 218 ; 

 Generative organs, 226. 



Asteriscus — Arms, 195, 199 ; Alimentary 

 canal, 213. 



Asteroidae — Rays of, 195 ; Ambulacral 

 plates, 202; Paxillae, 203; Dermal 

 skeleton, 205; Internal skeleton, 205; 

 Spines, '206; Pedicellariae, 206; 

 Muscular system, 207 ; Nervous sys- 

 tem, 208; Interradial caeca, 215; 

 Stone-canal, 221; Generative organs, 

 224. 



Astraeida? — Skeleton, 106. 



Astropecten — Alimentary canal, 213 ; 

 Interradial caeca, 215; Stone-canal, 

 221. 



Ateles— Clitoris of, 623. 



Atlanta— Shell, 323, 332; Foot, 324; 

 Excretory organ, 378; Receptaculum 

 seminis, 385. 



Aulacostomum — Mid-gut, 162. 



Aurelia — Disc of, 24 ; Figure of, 98 ; 

 Discophora form, 99; Muscular 

 system, 108; Gastrovascular system, 

 115. 



Aves — Corium, 417 ; Scales, 418 ; Claws, 

 419; Feathers, 419; Vertebral 

 column, 429 ; Centra of vertebrae, 

 433 ; Sacrum, 434 ; Caudal vertebrae, 

 434; Cervical vertebrae, 434; Axis, 

 437 ; Odontoid process, 437 ; Ribs, 

 440; Covering bones of skull, 459; 

 Lachrymal, 459 ; Palato-quadrate, 

 459 ; Pterygoids, 461; Palatines, 461; 

 Premaxillae, 462 ; Dentaries, 462 ; 

 Shoulder-girdle, 476 ; Clavicles, 477 ; 

 Phalanges, 471 ; Pelvis, 486 ; Tarsus, 

 488 ; Brain, 505 ; Spinal chord, 512 ; 

 Olfactory nerve, 515 ; Gustatory 

 organs, 525 ; Olfactory organs, 525 ; 

 Sclerotic, 530; Eyelids, 532; Lagena, 

 536 ; Tympanic cavity, 537 ; Colu- 

 mella, 538; External ear, 538 ; Cloaca, 

 562, 620 ; Pancreatic ducts, 565 ; 

 Larynx, 570 ; Lower larynx, 571 ; 

 Epiglottis, 571 ; Ova, 609 ; Sperm, 

 609 ; Bursa Fabricii, 620. 



Avicula — Byssus gland, 329 ; Branchiae, 

 336. 



Balanida — Mantle, 236 ; Branchiae, 243 ; 



Dermal skeleton, 249; Cement glands, 



286 ; Hermaphroditism in, 293. 

 Balanoglossus — Enteric branchiae, 163 ; 



Vascular system, 170 ; Ventral 



groove, 402. 



2 s 2 



