XIV CONTENTS 



Genus Virginia 119 



Genus Potamophis 120 



Genus Tropidoclonion 120 



Genus Liodytes 121 



Genus Thamnophis 121 



Genus Coniophanes 126 



Genus Oxybelis 127 



Genus Leptodeira 127 



Genus Trimorphodon 127 



Genus Tantilla 128 



Family Elapidae 129 



Genus Micrurus 129 



Genus Micruroides 130 



Family Hydrophidae 130 



Genus Pelamydrus 130 



Family Crotalidae 131 



Genus Agkistrodon 131 



Genus Sistrurus 131 



Genus Crotalus 132 



Subclass Synapsida 137 



Order Testudinata 137 



Family Kinosternidae 137 



Genus Sternotherus 137 



Genus Kinosternon 138 



Family Chelydridae 140 



Genus Macrochelys 140 



Genus Chelydra 140 



Family Testudinidae 141 



Genus Clemmys 141 



Genus Emys 142 



Genus Terrapene 142 



Genus Malaclemys 143 



Genus Graptemys 144 



Genus Chrysemys 146 



Genus Pseudemys 147 



Genus Deiroehelys 149 



Genus Gopherus 149 



Family Cheloniidae 150 



Genus Chelonia 150 



Genus Eretmochelys 151 



Genus Caretta 151 



Family Dermochelidae 152 



Genus Dermochelys 152 



Family Trionychidae 153 



Genus Amyda 153 



