498 VIPERID. 
Total length 510 millim. ; tail 35. 
Cape Colony, Namaqualand, Damaraland. 
a-b. 2 (Se. 27; V.152; Cape of Good Hope, Lord Derby [P.]. 
CO. 24) & as (Sc. 25; 
V. 149; C. aA 
ce. 2 (Sc. 29; V. 187; Cape of Good Hope. Sir A. Smith [P.}. 
C. 25 
. 25). 
d. & (Se. 27; V. 123; Cape ofGood Hope. — Ford, Esq. [P.]. 
CO. 30 
. 80). 
e. od (Se. 25; V. 124; Kuysua,Cape Colony. Rev. G. H. R. Fisk 
C. 25). [P.]. 
tig. 2 (Se. 26, 29; V. S. Africa. . 
124, 120; O. 28, 21). 
6. Bitis caudalis. 
Vipera ocellata (non Latr.), Smith, Mag. N. H. (2) ii. 1838, p. 92. 
Cerastes ocellatus, Smith, Ill. Zool. S. Afr., Rept. pl.iv., text (1838). 
Vipera caudalis, Smith, 2 cit. pl. vii. (1839) ; Jan, Rev. § Mag. Zool. 
? 
859, p. 155; Strauch, Syn. Viper. P 106 (1869); Boettg. Ber. 
Senck. Ges. 1886, p. 6, and 1887, p. 167; Bocage, Herp. Angola, 
p. 150 (1895 
s, Gray, Zool. Miscell. p. 70 (1842); Dum. & Bibr. 
Cerastes caud 
vii. p. 1446 (1854). 
Vipera schneideri, Boettg. Ber. Senck, Ges. 1886, p. 8, pl. i. fig. 1. 
Nostrils turned upwards and outwards. Rostral small, once and 
two thirds to twice and a half as broad as deep ; head covered with 
small, imbricate, keeled scales, 12 to 16 across the vertex from eye 
to eye; a single, erect, horn-like scale usually present above the 
eye; 10 to 16 scales round the eye; two to four series of scales 
between the eye and the labials; two or three series of scales 
between the supranasals; two series of scales between the nasal and 
the rostral ; 10 to 13 upper labials; two or three lower labials in 
contact with the chin-shields, Scales in 22-29 rows, strongly 
keeled, outer row smooth or faintly keeled. Ventrals 112-153; 
anal entire ; subcaudals 18-33, well developed in the males, scale- 
like and more or less distinctly keeled in the females. Pale buff, 
reddish, or sandy grey above, with two series of brown spots with 
light centres, and frequently a vertebral series of narrower spots ; 
the spots may be edged with yellow; yellowish white beneath, 
uniform or with small blackish spots on the sides, 
Total length 360 millim.; tail 25. 
8.W. Africa, from Angola to Namaqualand. 
a-e. 3 (Sc. 29, 26,25; 8S, Africa. Sir A. Smith [P.}. 
V. 134, 124, 145; C. 
130; O. 29). 
f-l, m-n. & (Se. 25, 27, Port Nolloth, Na- Rev. G. H. R, Fisk [P.}, 
25; V.112, 118,118;  maqualand. 
C. 22, 22, 20) & yg. 
