CLASS REPTILIA. 



Shaw. Pelais Niger, Merrem. 2 Catesby, Car. t. 44. 



Scytale Niger, Daud. Trigonocephalus Boiei. Tris, xx. 



561. Inhab. Carolina. 



Gen. II. ViPERA, 



Head broad, without any pit ; covered with scales or 

 small shields. 



A. Head covered with scales like the bacJc ; subcaudal plates 

 double ; nostrils large. Vipera. Echidna, Merrem. (not 

 Geoffrey.) Cerastes, Wagler ! 



Vipera Nasicornis, Daud. Coluber, Shaw. Nat. Misc. t. 



94. Zool. t. 104. Brit. Mus. Vipera Russelii. Coluber, 



Shaw. Zool. t. 108. Russel Ind. Serp t. 7. Col. Trinocu- 

 lus, Schn. Vipera Elegans, Daud. Col. Triseriatus, 



Herm. Bengal. Brit. Mus. Vipera Cerastes ; male with 



horn before the eyes. Col. Cerastes, Hasselq. Ellis Phil 

 Trans 4. vi. t. 14. Shaw Zool. t. lOa Lacep. ij. t. 1. f. 9. 

 Daud, vi. t. 47- f- 1. Col. Cornutus, Hasselq; female horn- 

 less. Col. Vipera, Hasselq. Aspis Cleopatra, Lain*. Col. 

 Egypticus, Lacep. Vipera ^gytia, Latr. Vipera ^gyp- 



tica, Daud. North Africa. Brit. Mus. Vij)era Lopho- 



phris, Cuv. Vipera Flava, Merrem. ? Paterson, Africa, t. 



15. Vipera Arietans, Echidna, Merrem. Vipera Inflata, 



Burchel. Seba, ij. t. 30. f. 1. Col. Intumescens, Donnd. 

 Vipera Severa, Daud. Col. Dubius, Gmel. Col. Hebriacus, 



Lacep. Col. Bitis, Bonnat. Vip. Brachyura, Cuv. 



Vipera Daboia, Daud. Daboia Lacep. t. 13. f. 2. Col. 



Braziliensis, Lacep. t. 4. f. 2. Vipera Ocellata, Latr. 



Aspic, Lacep. ij. t. 2. f. 1. Vipera Atropos. Coluber, 



Linn. Mus. Adolph. t. 13. f. 1. 



B. Head covered with granular scales; sub-caudal jilates 



double ; nostrils moderate, Berus. 



G 81 



