(6) A. bibronii.—Characters as before. Snout prominent, subcuneiform. 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, Namaqualand, Angola.
(7) A. aterrima.—Characters as before. Snout rounded; 251-300 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.