THE PBINCIPAL SPECIES OF POISONOUS SNAKES 57 



Habitat : Sumatra, Java, Borneo, Natuna Islands. 



(17) L. borneensis. — Scales in 19 — 21 rows; 10 — 11 series of 

 scales between the supraocular shields ; 152 — 168 ventrals ; 43—65 

 subcaudals. 



Total length, 770 millimetres ; tail 105. 



Habitat : Borneo, Sumatra. 



C. (18) L. wagleri. — Scales in 19 — 27 rows, 127 — 164 ventrals ; 

 45 — 55 subcaudals ; tail prehensile. 



Colour green, with darker or lighter markings, black and yellow, 

 or nearly entirely black. 



Total length, 980 millimetres ; tail 150. 



Habitat : Malay Peninsula and Archipelago. 



C.—AFBICA. 



In Africa, poisonous snakes abound throughout the whole of the 

 tropical and sub-tropical zones. The fatal accidents to human 

 beings caused by them in this continent are fewer than in India, 

 since the population of Africa is less dense, but several species 

 occur, the venom of which is especially dangerous to life. 



These species belong in nearly equal numbers to the Families 

 CoLUBBiDiE and Vipebid^. 



I. CoLUBBIDiE. 



The poisonous Colubeid^ of Africa are all included in the 

 Subfamily ElapincBj of which the following are the eight principal 

 genera : — 



(a) Boulengerina. 



(b) Elapechis. 



(c) Naja. 



(d) Sepedon. 



(e) Aspidelaps. 



(f) Walterimiesia. 



(g) Homorelaps. 

 (h) Dendraspis. 



