498 viPBEir^. 



Total length 510 miUim. ; tail 35. 



Cape Colony, Namaqualand, Damaraland. 



a-b. 2 (Sc. 27 ; V. 152 ; Cape of Good Hope. Lord Derby [P.]. 



C. 24) & y^. (Sc. 25 ; 



V. 149 ; C. 29). 

 «. 5 (Sc. 29 ; V. 137; Cape of Good Hope. Sir A. Smith [P.]. 



C. 25). 



d. cJ (Sc. 27 ; V. 123 ; Cape of Good Hope. — Ford, Esq. [P.]. 

 C. 80). 



e. c? (Sc. 25 ; V. 124 ; Kuysua, Cape Colony. Rev. G. H. E. Fisk 

 C. 25). [P.]. 



/, g. 5 (Sc. 26, 29 ; V. S. Africa. 



124,120; C. 23, 21). 



6. Bitls caudalis. 



Vipera oceUata {nm Zatr.), Smith, Mag. N. S. (2) ii. 1888, p. 92. 

 Cerastes ocellatus. Smith, til. Zool. S. Afr., Rept. pi. iv., text (1838). 

 Vipera caudalis, Smith, op. cit. pi. vii. (1839) ; Jan, Rev. 8f Mag. Zool, 



1859, p. 155 ; Strauch, Syn. Viper, p. 106 (1869) ; Boettg. Ber. 



SencJc. Oes. 1886, p. 6, and 1887, p. 167 ; Boeage, Herp. Angola, 



p. 150 (1895). 

 Cerastes caudalis. Gray, Zool. Miscell. p. 70 (1842) ; Dum. ^ Bihr. 



vii. p. 1446 (1854). 

 Vipera sclineideri, Boettg. Ber. Sench. Ges. 1886, p. 8, pi. i. fig. 1. 



Nostrils turned upwards and outwards. Eostral 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-Uke 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, 

 Tiniform or with small blackish spots on the sides. 



Total length 360 miUim. ; tail 25. 



S.W. Africa, from Angola to Namaqualand. 



a-e. (J (Sc. 29, 26, 25; S. Africa. Sir A. Smith [P.]. 



V. 134, 124, 145 ; C. 



32, 23, 30), 2 (Sc. 



25; V. 163; C. 23), 



& yg. (Sc. 29; V. 



130 ; C. 29). 

 J-l, OT-re. 2 (Sc. 25, 27, Port NoUoth, Na- Rev. G. H. R. Fisk [P.]. 



25 ; V. 112, 113, 118 ; maqualand. 



C. 22, 22, 20) & yg. 



