68 VENOMS 
Colour grey or pale brown above, with a series of large rhom- 
boidal or V-shaped blackish-brown spots; a large A-shaped dark 
brown mark on the occiput; an oblique dark streak behind the 
eye; supralabial shields edged with black ; belly yellowish. 
Total length, 400 millimetres ; tail 22. 
Habitat: Central and East Africa, Transvaal. 
Fic. 35.—SKULL or Causus rhombeatus. (After G. A. Boulenger, op. cit.) 
(4) C. lichtensteinii.—Snout obtuse; scales in 15 rows; 142— 
144 ventrals ; subcaudals 15—21, single. 
Colour greyish, with rather indistinct darker chevron-shaped 
cross-bands. 
Total length, 413 millimetres ; tail 35. 
Habitat: West Africa (Gold Coast), Congo. 
