9. ATEACTASPIS. 617 



rows. Ventrals 210-215 ; anal entire ; suboaudals 29-30, single. 

 Uniform dark brown. 



Total length 330 miUim. ; tail 28. 



Cape Verd. 



. a. 2 (V. 210; 0. 29). P Dr. St. George Mivart [P.]. (Type.) 



10. Atractaspis leucomelas. 



Atractaspis leucomelas, Bouleng. Ann. Mils. Genova, (2) xv. 1895, 

 p. 16, pi. iv. tig. 2. 



Snout very short. Portion of rostral visible from above nearly as 

 long as its distance from the frontal ; suture between the internasals 

 half as long as that between the praefrontals ; frontal once and two 

 fifths as long as broad, much longer than its distance from the end 

 of the snout, as long as the parietals ; one prse- and one postocular ; 

 temporals small, scale-like, 2 + 3 ; six upper labials, third and fourth 

 entering the eye, fourth largest ; first lower labial forming a suture 

 with its fellow behind the symphysial ; three lower labia] s in 

 contact with the chin-shields. Scales in 23 rows. Ventrals 243 ; 

 anal entire ; subcaudals 27, nearly all single. Black above, with a 

 white vertebral line, occupying one and two half rows of scales ; 

 ventrals and subcaudals, and four outer series of scales on each 

 side, white ; neck entirely black ; head white, with a black blotch 

 covering the nasals and the upper head-shields. 



Total length 575 miUim. ; tail 40. 



Ogaden, iSomaliland. 



11. Atractaspis microlepidota. 



Atractaspis microlepidota, Oilnth. Ann. 8f Mag. N. H. (3) xviii. 



1866, p. 29, pi. vii. fig. 8, and (6) i. 1888, p. 832 ; Bouleng. Ann. 



Mus. Oenom, (2) xv. 1895, p. 15. 

 fallax, Peters, Mm. Bert. Ac. 1866, p. 890, and in Beckenh 



Meise O.-Afr. iii. p. 17, pi. i. fig. 8 (1869). 



Snout very short, prominent, subcuneiform. Portion of rostral 

 visible from above nearly as long as its distance from the frontal ; 

 suture between the internasals as long as that between the prae- 

 frontals ; frontal a little longer than broad, much longer than its 

 distance from the end of the snout, longer than the parietals ; one 

 prse- and one postocular; temporals small, 2-1-3 or 4; six upper 

 labials, third and fourth entering the eye and largest ; first lower 

 labial in contact with its fellow behind the symphysial; three 

 lower labials in contact with the chin-shields. Scales in 29-37 

 TOWS. Ventrals 212-245 ; anal entire ; subcaudals 26-37, single. 

 Uniform dark brown. 



Total length 540 miUim. ; tail 45. 



East and Central Africa. 

 a. $ (So. 29; V. 212 ; 0. 26). ? Dr. Gunther [P.]. 



I,. 2 (Sc. 37; V. 245; G. 28). L. Tanganyika, Sir J. Kirk [C .], 



