sO VENOMS 
Habitat: West Africa, from the Gold Coast to the Congo; 
Central Africa. 
(4) A. corpulenta.—Postocular shield in contact with a large 
temporal; second lower labial very large, fused with the chin- 
shields. Scales on the body in 23—27 rows; 178—193 ventrals ; 
23—27 subcaudals. 
Colour uniform blackish-brown; tail sometimes white. 
Total length, 345 millimetres; tail 33. 
Habitat : West Africa, from Liberia to the Gaboon. 
(5) A. rostrata. — Snout very prominent, cuneiform. Third 
lower labial very large; first lower labial in contact with its fellow, 
behind the symphysial. Scales on the body in 19—23 rows; ven- 
trals 227—248. 
Colour uniform dark brown, or blackish. 
Total length, 600 millimetres ; tail 37. 
Habitat: Kast and Central Africa. 
(6) A. bibronii.—Characters as before. Snout prominent, sub- 
cuneiform. Ventral scales, 221—260. 
Colour dark purplish-brown above, dull yellow or pale brown 
on the belly. 
Total length, 600 millimetres; tail 25. 
Habitat: Eastern districts of Cape Colony, Natal, Namaqua- 
land, Angola. 
(7) A. aterrima. — Characters as before. Snout rounded; 
251—3800 ventral scales. 
Colour uniform dark brown or black. 
Total length, 650 millimetres ; tail 30. 
Habitat : West and Central Africa. 
(8) A. dahomeyensis.—Characters as before. Symphysial shield 
in contact with the chin-shields. Scales on the body in 31 rows ; 
240 ventrals ; 24 subcaudals. 
Colour black above, brown on the belly. 
Total length, 490 millimetres; tail 32. 
Habitat : Dahomey. 
