248 COLUBRIDJR. 



rows of small brown spots along the back ; uniform whitish 

 inferiorly. 



Total length 300 millim. ; tail 43. 



South Africa. 



a. $ (V. 164 ; C. 24). Durban, Natal. Capt. Munn [P.]. 



ft. Hgr. (V. 156; C. 25). Orange R. Dr. Kunneme} er [P.]. 



c. d (V. 154 ; C. 38). S.Africa. (Type of Rhinostoma cuprttum.) 



d-<, f-h. rf (V. 144 ; C. S. Africa. 



28), $ (V. 161 ; C. 23), 



& hgr. (V. 130, 125, 



136; C. 28, 27, 28). 



2. Prosymna frontalis. 



Temnorhynchus frontalis, part., Peters, Mon. Berl. Ac, 1867, p. 236, 



pi. -. tig. 1. 

 Prosymna frontalis, Bocage, Jorn. Sc. Lisb. iv. 1873, p. 217, and viii. 



1882, p. 288. 



Closely allied to P. sundevallii, but frontal smaller, not half the 

 width of the head, rostral smaller and separated from the prse- 

 frontal by a single band-like internasal, temporals 1+2, and tail 

 more elongate. Ventrals 167 ; subcaudals 50. 



Total length 135 millim. ; tail 57. 



Otjimbingue and Mossamedes, S.W. Africa. 



3. Prosymna ambigna. 



Prosymna ambiuuus, Bocaye, Jorn. Sc. Lisb. iv. 1873, p. 218. 

 Ligonirostra stunlmanni, Pfeffer, Jahrb. Hamb. Wiss. Anst. x. 1893, 

 p. 78, pi. i. figs. 8- 10. 



Rostral very large and broad, with angular horizontal edge ; a 

 single internasal and a single praefrontal ; frontal large, more than 

 half the width of the head, a little longer than the parietals ; loreal 

 longer than deep ; one prae- and two postoculars ; temporals 1 + 2 ; 

 six or seven upper labials, third and fourth entering the eye ; only 

 one pair of well-developed chin-shields. Scales smooth, in 15 or 

 17 rows. Ventrals 133-152 ; anal entire ; subcaudals 19-34. 

 Blackish above, each scale usually greyish in the centre ; lower 

 parts whitish or brown. 



Total length 255 millim. ; tail 27. 



East Africa, Angola. 



a-k. c? (V. 134, 137, 133 ; Zanzibar. Sir J. Kirk [C.]. 



C. 32, 31, 34), $ (V. 



150, 141, 161 ; C. 24, 



19, 21), hgr. (V. 137, 



140, 140 ;C. 24, 21, 20), 



&vg. (V. 152; C. 22). 

 /. Ad., bad state. Shire" Valley, Zambezi. 



