INDEX. 



Every reference is to the page : words in italics are names of genera or 

 species; figures in italics indicate that the reference relates to syste- 

 matic position ; figures in thick type refer to an illustration ; /. = and 

 in following page or pages; n. = note. 



Aard Vark 44, 352; femur 517; 



sacrum 452 ; teeth 425 ; see 



Orycteropus 



Aard wolf 48 ; see Proteles 

 Abdominal ribs, crocodile 260 ; 



reptiles 286 



Abdominal shield, turtle 215 

 Acanthias 32 ; calcification of ver- 

 tebrae 114 ; pectoral fins 130 

 Acanthodes 32, 64 

 Acanthodii 32 ; general characters 



64 ; spines 106 

 Acanthomys 47 ; spines 417 

 Acanthopterygii 34 

 Accipitres 41 

 Acetabular bone 25, 513 ; dog 409 f.; 



frog 165 

 Acetabulum 25 ; crocodile 266 ; 



dog 409; duck 324; frog 165; 



newt 149 ; turtle 235 

 Acipenser 32, 117 ; exoskeleton 67 ; 



distribution 66 ; pectoral fins 



131 ; plates 104 ; skull 121, 122 ; 



spinal column 112 

 Acipenseridae 32 

 Acrodont, defined 199; teeth of 



reptiles 273 

 Acrodus 32 ; teeth 109 

 Acromion, dog 405 

 Actinotrocha 30 ; organ regarded as 



double notochord 51 



Ad-digital quill, duck 303 

 Adjutant 41 ; clavicles 338 

 ^Egithognathous 335 

 ^Eluroidea 48, 369 ; teeth 437 

 ^Epyornis 40 ; tibio-tarsus 341 

 ^Epyornithes 40, 299 

 Aftershaft 328 

 Agama 38 ; teeth 273 

 Agamidae 38 ; premaxillae 284 

 Aglossa 36 



Agouti 48 ; see Dasyprocta 

 Agriochoeridae 45 

 Agriochoerus 45 ; pes 525 

 Ala spuria, duck 304 

 Alcidae 42 ; see Auks 

 Alisphenoid 19 ; crocodile 247 ; duck 



317 ; dog 386 

 Alligator 39, 210, 212 ; hyoid 285 ; 



limbs 264 ; pectoral girdle 262 ; 



pelvis and sacrum 267 ; scutes 



271 ; skull 245, 248, 253 

 Alligatoridae 39 

 Alytes 36; fronto-parietal fontanelle 



179 ; vertebrae 172 

 Amblypoda 47 ; general characters 



363 ; manus 510 ; pes 525 ; skull 



473 ; teeth 433 ; thigh and shin 



519 



Amblystoma 35; skull 175 

 American monkeys 373; see Ce- 



bidae 



342 



