INDEX 



All numbers refer to pages : words in italics are names of families, genera and 

 species : words in thick type are names of higlier divisions : words in small 

 capitals are names of examples. Numbers in thick type are numbers of pages on 

 wiiich there are figures : an asterisk after a numljer indicates a definition of the 

 term or of the group. 



A. 



Lard-varks, 479, 604 — See Orycteropns 



Abdomen — Mammals, 72*, 447 



Abdominal cavity, of Craniata, 7'2 



Abdominal pore, (57, 68, 146, 250 



Abdominal ribs, 302, 347, 419 



Abdominal vein, 281, 326 



Abducent nerve, of Craniata, 105 



Abductor muscles, 276 



Abiogenesis, 671* 



Abomasum, 571* 



Abyssal fauna, 635* 



Acanfkias, 178 



Acanthodei, 168* 



Acaiithodt.'i, 169 



^canthodrilns, 621 



Acanthopteri, 221*, 225, 228, 232, 243 



Accessory nerve, of Craniata, 104, 106 



Accessory scapula, 430 



Accipitres, 416, 445 



Acetabulum, of Craniata, 83, 84* 



Acipenser, 219 — See Sturgeon 



Acipenser ruthenus, 219 



Acrania, 44 — See Amphioxm 



Acrocoracoid process, 390 



Acrodont, 355* 



Acromion process, of Pigeon, 391 ; Rab- 

 bit, 455— See Pectoral arch 



Acustico-lateral centre, 162 



Ad-digital, 385 



Adductor muscles, 276 



Adelochorda, 2* : Affinities, 13 



Adhesive papilla, of Ascidian larva, 34, 

 37 



Adipose bodies, of Frog, 287 : Lizard, 

 328 



Adipose fin, 200* 



Adipose lobe, 200 



Adrenals, of Craniata, 120 : Frog, 286 : 



Pigeon, 397 : Rabbit, 473 

 .F]githognathous, 428* 

 ^Piiornis, 411, 436, 443, 642 

 jEpyornitlies, 411 

 Aerial fauna, 637 

 Afferent branchial arteries, 92 : of Am- 



phioxus, 51 — See Vascular system 

 Affinities — See Relationships 

 After-shaft of Feather, 381, 423 

 Agamidce, 369 

 Agassiz, Alex., 684 

 Agassiz, Louis, 682 

 Aggressive resemblance, 657 

 Aglossa, 294*, 304 

 Agoutis, 507 

 Air-bladder, 90* 

 Air-bladder, of Trout, 210, 211 : Teleos- 



tomi, 236 

 Air-sacs, of Chamaileon, 358 : Pigeon, 



399, 400 : Birds, 434 

 Air-space, of Bird's egg, 436 

 Ala spuria, 385* 

 Alar membrane, 380* 

 Alaudida, 417 

 Albatrosses, 415, 430, 436 

 AUnda, 238 



Albumen, of Bird's egg, 408, 435 

 Alca, 416 



Alca impenni.i, 426, 443 

 Alcedinidce, 417, 436 

 Ali-sphenoid, 79*, 80— See Skull 

 Allantoic bladder, of Craniata, 120* 

 Allantois, Reptiles, 313, 365: Bird, 441, 



442 : Rabbit, 475 : Mammalia, 591 

 Alligator, 336, 354, 355, 357, 360, 368, 



370 

 Alpine fauna, 638 

 Altrices, 442* 



69V 



