INDEX. 



Every reference is to the page. In some cases the upper and lower half of 

 the page is indicated by a small number, ^ or '^, placed above the number of the 

 page. Figures in black type refer to the systematic position. Figures in 

 italics refer to an illustration. 



Aardvark, .543^ 

 Abastor, 367^. 

 Abderitidae, 538'. 

 Abdimia, 481 -. 

 Abdominal fin, 185. 

 Abdominal pores, Chel- 



onia, 410; Crocodilia, 



379 ; Dipnoi, 249 ; 



Elasmobranchii, 120 ; 



fishes, 90 ; Marsipo- 



branchii, 112; Tele- 



ostei, 208. 

 Ablabes, 367-\ 

 Ablabophis, 366-. 

 Ablepharus, 354 1. 

 Abramis, 220-'. 

 Abrocoma, 635'. 

 Abrostomus, 219^. 

 Acalyptophis, 370 1. 

 Acanthaphritis, 243^. 

 Acantharchus, 234'. 

 Acanthias, 126. 152'. 

 Acanthicus, 222 1. 

 Acanthistius, 235'. 

 Acanthobrama, 220-. 

 Acanthocybium, 238-. 

 Acanthodactylus, 353'. 

 Acanthodes, 146, 147. 

 Acanthodii, 146. 

 Acantholabrus, 2372. 

 Acanthonus, 244-. 

 Acanthophis, 370'. 

 Acanthojjhthahnus, 



2211. 

 Acanthopsis, 221'. 

 Acantliopterygian, 185. 

 Acanthopterygii, 233. 

 Acanthorhocleus, 220'. 

 Acanthosaura, 350'. 

 Acanthurus, 237'. 

 Acanthvllis, 473'. 

 Acara, 237-. 



Ace. = accessory. 

 Accentor, 475-. 

 Aocipiter, 4632. 

 Accipitres, 483'. 

 Acentrophorus, 176, 



179. 

 Accra therium, 601 2. 

 Acerina, 2342. 

 Aceros, 4712. 

 Acestra, 222'. 

 Achaenodon, 582i. 

 Achalinus, 3662. 

 Achilognathus, 220'. 

 Achirus, 2402. 

 Acipenser, 168, 169, 



170 ; pericardium, 85. 

 Acomus, 4652. 

 Acomys, 634'. 

 Aconaemys, 635'. 

 Acontias, 354'. 

 Acrania, 11. 

 Acris, 3111. 

 Acrobates, 5362. 

 Acrochilus, 220i. 

 Acrochordonichthvs, 



2212. 

 Acrochordus, 3862. 

 Acrodont, 34.3. 

 Acrodus, 1511. 

 Acronurus, 237i. 

 Acropoma, 2312. 

 Acrosaurus, 334. 

 Acrotus, 2312. 

 Acryllium, 465'. 

 Actinotrichia, 54. 

 Actitis, 4671. 

 Acustico-lateralis, 75, 



76. 

 Adapis, 6531. 

 Adapisoricidae, 6402. 

 Adaptive reduction, 



579. 



Addax, 591'. 



Adeciduata, 520. 



Adipose fin, 185. 



Adjutant, 4612. 



Adrenals, 442. 



Aegaeonichthys, 246i . 



Aegialitis, 467 1. 



Aegithalus, 477'. 



Aegithognathous, 430. 



Aegotheles, 4722. 



Aelurichthys, 2212. 



Aelurictis, 619i. 



Aeluroidea, 6162, 618. 



Aeluronyx, 349'. 



Aeluropus, 623'. 



Aelurosaurus, 349', 

 4002. 



Aelurus, 623'. 



Aepyceros, 591 1. 



Aepyornis, 4582. 



Aepyprymnus, 5352. 



Aesculap-snake, 3672. 



Aesopia, 2402. 



Aetobatis, 1542. 



Aetosaurus, 382'. 



Aex, 4631. 



Affinities, of Marsipo- 

 branchii, 115 ; of 

 Rhynchocephalia, 

 332. 



Afr. = African. 



Aftershaft, 421. 



Agalvchnis, 311'. 



Agama, 350'. 



Agamodon, 353'. 



Agamura, 349'. 



Agapornis, 4702. 



Age, Carp, 219i ; ele- 

 phant, 571. 



Ageniosus, 2212. 



Aglossa, 309. 



Aglypha, 366 1. 



