CHAPTER: VIE 
THE PROTEROGLYPHA OR FRONT-FANGED SNAKES 
(SOLENOGLYPHA.) 
FAMILY V.—VIPERIDZ. 
ADDERS, VIPERS AND PIT-VIPERS. 
THE Viper family of snakes, with one or two exceptions, are 
different in appearance to those of the Colubrine family, to which 
Fic. 84.—The life-size head and poison fangs of the typical viper of South Africa, viz. 
the Puff Adder (Bitis artetans). 
the Cobra belongs. They have flat heads, usually more or less tri- 
angular, bodies thick and plump, and tails short. All are venomous. 
