LIST OF SOUTH AFRICAN SNAKES. 
I. CAUSUS RHOMBEATUS. 
459 
Sepedon rhombeatus, Lichtenst. Verz. Doubl. Mus. Berl. p. 106. 
Causus rhombeatus, Bouleng., f.c., p. 467. 
Tropical and South Africa. 
Cape Colony: Cape Peninsula (Tinley) ; Knysna (Oakley) ; Burghers- 
dorp (Kannemeyer) ; Tsomo, Transkei (Watermeyer) ; George 
(Leipoldt) ; Port St. Johns (Shortridge) ; Kimberley (French). 
Basutoland : Morija (Dyke). 
Natal: Durban (Bowker). 
Transvaal: Barberton (Rendall) ; Krugersdorp (Watson). 
Southern Rhodesia: Salisbury (Marshall) ; Mazoe (Darling). 
2. CAUSUS DEFILIPPII. 
Heterodon defilippii, Jan, Arch. Zool. Anat. Phys. ii, 1862, p. 225. 
Causus defilippu, Bouleng., t.c., p. 469. 
Natal, Transvaal, Southern Rhodesia, Central and East Africa. 
Natal: Pinetown (Bowker). 
Transvaal: Barberton (Rendall). 
Rhodesia: Salisbury (Thomas) ; Livingstone (Sykes). 
2. Bids: 
Gray, Zool. Miscell. p. 69; Bouleng. Cat. Sn. iii. 
Six Species in South Africa. 
I. Nostrils directed upwards ; scales in 31 to 41 rows .. 
II. Nostrils directed upwards and outwards ; scales in 
21 to 31 rows 
A. Supraocular region not raised, without horn-like 
scales ; sub-caudals well developed and smooth 
in both sexes. 
Outer row of scales smooth 
Outer row of scales keeled . ee a ae 
B. Supraocular region raised, without horn-like 
scales ; sub-caudals well developed and smooth 
in both sexes : 
C. Supraocular region usually with horn-like scales ; 
sub-caudals, in females, small and scale- like, 
more or less distinctly keeled. 
Several supraorbital horns : 
Mee horn, if present, single 
. BITIS ARIETANS. 
Vipera arietans, Merrem, Tent. Syst. Amph. p. 152. 
Bitis avietans, Bouleng., t.c., p. 493. 
Tropical and South Africa, Arabia. 
Cape Colony : Cape Peninsula (Oakley) ; Paarl (Hugo) ; 
B. 
nh 
eofey) 
. 492. 
avietans. 
. peringueyt. 
. atvopos. 
. nornata. 
. cornuta. 
. caudalis. 
Port St. Johns 
(Shortridge) ; Port Elizabeth (Moorhouse) ; Little Namaqualand 
(Péringuey). 
Basutoland: Morija (Dyke). 
Natal: Victoria County (Bowker). 
Southern Rhodesia: Mazoe (Darling); Hunyani River (Thomas) ; 
Salisbury (Thomas). 
German South-West Africa: Damaraland (Fairbridge). 
2. BITIS PERINGUEYI. 
Vipera peringueyi, Bouleng. Ann. & Mag. N. H. (2) it, 
Bitis peringueyi, Bouleng., ¢.c., p. 495. 
German South West Africa, Kalahari, Angola. 
Walfisch Bay territory (Nightingale), type. 
1888, p. 141. 
