I 



SNAKES. 117 



of the body large, flat, elongated, rounded at the end ; an elongated 

 plate between the nasal and rostral plates. 



Inhab. Shores of Euphrates, Martin. Mus Zool. Soc. ? 



I have not been able to find it in the collection : it may be 

 the same as D. Xanihina. 



Page 27, add 



1. The Peruvian Adder. Clotho ? oceilata. Echidna ocel- 

 lata, Tschudi^ Rept. Consp. 166. 



Brown, with two longitudinal series of pale centred black spots ; 

 beneath ash-brown; shields 139 + 22. Length 10 inches. 



Inhab. Peru, Tschudi. 



This is the only species of ViperidcB found in the Western 

 World. I do not know to which genus it properly belongs, as I 

 have not seen it. 



Page 27. Cerastes, add 



Cerastes sp., Rafin. Anal, Nat. 77, 1815. 



