Ophisaurus 22 
Oribata 54, 73 
Orthis 39, 50 
Orthoceras 51 
Parallelodus 43, 50 
Phrynosoma 22 
Pityophis 25 
Plestiodon, 23 
Plethodon 14, 17 
Primitia 51 
Proteus li 
Psiloconcha 50 
Pterotheca 45, 51 
Pterygometropus 46-47, 51 
Ptychopyse 51 
Rana 14-15, 18 
Rhinodictya 50 
Rhizoglyphus 54, 75 
Rhyncholophus 54-61 
Rhytima 50 
Scaphiopus 14, 20 
Sceloporus 13-16, 22 
Siren 18 
Sistrurus 14, 27 
Smaris 54, 61 
Spelerpes 14-17 
Index to Genera. 83 
Sphenolium 50 
Sternothoerus 20 
Storeria, 14, 24 
Streptelasma 50 
Strophomena 50 
Tantilla 26 
Technophorus 47-48, 51 
Terrapene 14, 21 
Testudo 12 
Thamnophis 11-12, 14-16, 24 
Trionyx 14 
Trombidium 54, 62-63 
Tropidoclonium 24 
Tropidonotus 14-15, 23-24 
Typhlomolge li 
Typhlotriton li, 14 
Tyroglyphus 54, 74 
Uropoda 54, 69-71 
Uroseius 54, 72 
Virginia 26 
Whiteavesia 50 
Zamesis 14, 25 
Zygospira 39, 50 
