INDEX 



References to generic names are in italics. 



Abdominal pore, 37, 53, 276 

 Abducens nerve, 26, 46, 355, 368, 



37o 

 Abomasum, 346 

 Acanthodes, 427 

 Accessory mesentery, 115, 272 

 Accommodation of eye, 391 

 Acetabulum, 93 

 Acetyl-cholin, action of, 388 

 Acipenser, 429 

 — , clavicle of, 313 

 — , spiracle of, 338 

 Acrodont dentition, 261 

 Acromion, 141 

 Actinotrichia, 66 

 Actinotrocha larva, 423 

 Adrenal, 62, 101, 152, 401 

 — , development of, 194 

 Adrenalin, 388 

 Afferent branchial artery, 13, 31, 58, 



187 

 After-birth, 234, 253 

 Aftershaft, 119, 224 

 Air-bladder, 77, 340 

 Air-chamber, 199 

 Air-sac, 127, 341 

 Ala temporalis, 283 

 Albumen egg-coat, 198, 402 

 Albumen sac, 213 

 Alisphenoid, 135, 295, 300 

 — canal, 137 

 Allantoic placenta, 232 

 Allantois, 213, 248 

 Alytes, 350, 352 

 Amblyopsis, 394 

 Amblypoda, 457 

 Amia, 429 

 — , heart of, 331 

 — , vertebrae of, 303 

 Ammocoete larva, 28, 399 

 Amnion, 208, 231, 253 

 Amniota, head of, 358 

 Amphibia, head of, 358 



Amphibia, skull of, 285 

 Amphioxus, sensory cells of, 365 

 Amphistylic skull, 283 

 Ampulla of ear, 24, 40, 395 



— of Lorenzini, 39 

 Analogy, 480 

 Anapsida, 288, 439 

 Angular, 71, 73, 298, 300 

 Animal pole, 161, 172, 198 

 Ant-eater y 457 



Anterior abdominal vein, 86, 98, 

 130 



— cardinal vein, 31, 58, 97, 330 



— cervical ganglion, 156, 385 



— chamber of eye, 23 



— commissure, 42, 155 



— gut-diverticula, 165 



— head-cavities, 165, 360 



— intestinal portal, 211, 230 



— laryngeal nerve, 155 



— mesenteric ganglion, 156, 385 

 Anthropoidea, 461 

 Anticipatory response, 380 

 Antilocapra, 260 



Antlers, 260, 482 



Anura, 435 



Aortic arches, development of, 187 



Aqueduct of Sylvius, 41 



Aqueous humour, 24 



Aquintocubitalism, 450 



Arachnoid membrane, 155 



Archceopteryx, 445 



— -, gastralia of, 258 



— , tail of, 326 



— , teeth of, 263 



— , wing of, 321 



Archenteron, 163, 177, 206 



Archinephros, 34, 348 



Archipallium, 380 



Archipterygium, 81, 312 



Area opaca, 200 



— pellucida, 200 



— vasculosa, 206, 231 



493 



