INDEX. 



Abomasiim 



Aranthia . 



Acanthocephali 



Acanthopteri 



Acarina .* 



Acephala. 



Acetabulum 



Achtheres 



Achieta 



Acipenser 



Acrania 79 



Acrydldie 



Actinia 



Actinozoa 



Acthiophri/s 



Adam's Apple 



Adaptatiou of feet of Uugulata 



for locomotion . . 167-8, 



of Ruminants for rapid 



locomotion 



of sloths to arboreal life, 

 of Marsupialia to ditfer- 



ent modes of life 



of Mammals to aquatic 



life UU, 



of Mammals to .trial life 

 of Mammals to subter- 

 ranean life 



of bird's skeleton and 



muscles to flight . . . . 1 



of bird's feet to different 



methods of locomotion I 



of Amphibia to burrow- 



of 



Lacertilia to different 



modes of life. . . . 107, 



of insects to aquatic life 



of Chelonia to aquatic and 



terrestrial life 



Page Page 



176 Adaptation of Hjda and frog 



214 to arboreal life 96, 97 



224 of fossil reptiles to differ- 



62 ent modes of life. .117, 120 



204 yE'jialitig 139 



228 .Elurkhthys 56 



85 JEpiiornis 134 



2(_K) A (jama 107 



259 Aifnlena 202 



73 A'/hssa 94 



274 Agouti 184 



209 Air-bladder of cyprinoids .... 58 



247 Function of 43 



245 Connection with auditory 



254 laiij'riuth 38 



1 59 Vessels of in Physoclysti . 63 



Coats .,f 42 



174 Of Ganoids 72 



In Acanthopteri 63 



1 75 In Dipnoi 78 



163 Air-bladder and duct of cat- 



Hsh 130, 42 



162 Air-sacs of birds — of locust.. 209 



Aix 139 



180 Albatross 138 



185 Alces 178 



Alewif e 60 



182 Alligator garpike 75 



AUhjator 115 



27-8 Alisphenoid 23 



Alpaca 1 77 



34-5 Altrices 131 



Alternation of teeth in mam- 



98 m ds 155 



Alula 122 



110 Alveolar part of maxillaries 



213 mammals 149 



Alveoli of lung in mammals. . 158 



104 A mhluplites 64 



