Ungualia melanura Dumeril and Bibron; 



Cuba 13 ( 8) 



Uriechis microlepidotus Gunther; 



Natal 27 ( 7) 



Uromacer oxyrhynchus Dumeril and Bibron; 



Haiti 24 (12) 



Vermicella annulata Gray; Australia 29 ( 9) 



Vipera aspis Linnaeus; Italy 31 ( 2) 



Virginia valeriae Baird and Girard ;Texas. . 21 ( 9) 



Xenodon almadensis Wagler; Brazil 24 ( 2) 



Xenodon reginae Linnaeus var '.Venezuela. . . . 25 ( 1) 



Xenodon severus Linnaeus; Brazil 24 ( 5) 



Zamenis hippocrepis Linnaeus; Italy 16 ( 5) 



Zamenis korros Linnaeus; Siam 14 ( 5) 



Zamenis ravergieri Menetrus; Persia 14 ( 4) 



