







INDEX 



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

 species : words in thick type are names of higher divisions : words in 

 small capitals are names of examples. Numbers in thick type are numbers 

 of pages on which there are figures : an asterisk after a number indicates 

 a definition of the term or of the group. 



A Adipose fin, 194* 



Adipose lobe, 194 

 Adrenals, of Craniata, 117 : Frog, 278 : 



Pigeon, 385 : Rabbit, 459 

 ^Egithognathous arrangement, 415* 

 ^Epyornis, 399, 423, 429, 621 

 /Epyornithes, 399* 

 Aerial fauna, 617* 

 Afferent branchial arteries, 90 : of 



Amphloxus, 49 See Vascular sys- 

 tem 



Affinities See Relationships 

 After-shaft of Feather, 370, 410*, 411 

 Agamidce, 358 

 Agassiz, Alex., 663 

 Agassiz, Louis, 661 

 Aggressive resemblance, 637 

 Aglossa, 285*, 295 

 Agoutis, 492 

 Air-bladder, 87* : of Trout, 204*, 205 : 



Teleostomi, 229 

 Air-sacs, of Chamaeleon, 347 : Pigeon, 



386, 387 : Birds, 421 

 Air-space, of Bird's egg, 422, 423 

 Ala spuria, 368, 373* 

 Alar membrane, 368 

 Alaudidce, 404 

 Albatrosses, 402, 417, 422 

 Albula, 231 



Albumen, of Bird's egg, 394, 422, 423 

 Alca, 403 



Alca impennis, 413 

 Alcedinidce, 404, 423 

 Ali-sphenoid, 77* See Skull 

 Allantoic bladder, of Craniata, 116* 

 Allantoic placenta, 577 

 Allantois, Reptiles, 303, 354 : Bird, 



427, 428 : Rabbit, 462 : Mammalia, 



575 



,ARD-VARKS, 465, 485, 5 r /9, 584 



See Orycteropus 



Abdomen Mammals, 70*, 433 

 Abdominal cavity, of Craniata, 70 

 Abdominal pore, 65, 66, 142, 243 

 Abdominal ribs, 293, 336, 405 

 Abdominal vein, 272, 273, 316, 558 

 Abducent nerve, of Craniata, 101, 102 

 Abductor muscles, 266 

 Abiogenesis, 650 

 Abomasum, 553* 

 Abyssal fauna, 615* 

 Acanthias, 173 

 Acanthodei, 163* 

 Acanthodes, 164 

 Acanthodrilus, 601 

 Acanthopteri, 214*, 218, 219, 221, 225, 



236 



Accessory nerve, of Craniata, 101, 103 

 Accessory scapula, 417 

 Accipitres, 403*, 431 

 Acetabulum, of Craniata, 80, 82* 

 Acipenser, 212, 234 See Sturgeon 

 Acipenser ruthenus, 212 

 Acrauia, 43* See Ainphioxus 

 Acrocoracoid process, 378 

 Acrodont teeth, 345* 

 Acromion process, of Pigeon, 378 : 



Rabbit, 441 See Pectoral arch 

 Acustico -lateral centre, 158 

 Ad-digital, 373 

 Adductor muscles, 266 

 Adelochorda, 2* : Affinities, 13 

 Adhesive papilla, of Ascidian larva, 34, 



35 

 Adipose bodies, of Frog, 279 : Lizard, 



316 



68 1 



