Plate 



POISOXOtS SNAKES 



HORNED ^IPER Cerastes cornutus. 

 Distribution: Northern border of the Sahara from Algeria to 

 Egypt and Nubia; also found in Arabia and southern Palestine. 

 Total length about a yard. 



COM^MON SAND VIPER Cerastes ripera. 



Distribution: Northern Africa, from Algeria to Egypt. 



Total length about two and one-half feet. 



