xiii 



Family Fhviatilia. 



Genus Triottyx 922 959 



Ckely* 960 



Ilydrtupu 9(11 



Emys 962991 



Cinotterno* 992 993 



Cutttdo 9941010 



Family Terregtria. 



Genus Tethido 10111096 



Development of Carapace and Plastron . 1097 1100 



Class AVES. 



Characteristics of the Skeleton and Osseous Texture . 1101 1117 



Order NATATORES. 



Family Pinnipennat<e. 



Genus Aptenodytet 11181145 



Mca 11461160 



FraterctUa 11611163 



Family Colymbidte. 



Genus Una 1164 



Colymbtu 11651166 



Family Tvtipalmata. 



Genus Pelecan** 1167 1179 



Pkalacrocortuc 1180 1183 



Snla 11841188 



Family Procettariiaa. 



Genus Diomedtea 1189 1219 



ProcfUaria 1220 1223 



Puffin** '. 1224 



Family Larida. 



Genus Lani* . 12251236 



