44. Boonojf. 330 



8. Boodon mentalis. 



Boodon mentalis, Gi'mth. Ann. S,- Macj. N. H. (6) i. 1888, p. 3:3], 

 pi. xix. fig. A. 



Eye moderate. Hostral fully twice as broad as deep, not visible 

 from above, forming a broad suture with tbe internasals, which arc 

 a little shorter than the ])r;cfrontals ; frontal once and two thirds 

 as long as broad, a little longer than its distance from the end of 

 the snout, as long as the parietals ; loreal longer than deep ; one 

 prffocular, in contact with the frontal : two postoculars ; temporals 

 1 +2 ; eight upper labials, third, fourth, and fifth entering the eye; 

 three lower labials in contact with the anterior chin-shields ; pos- 

 terior chin-shields very narrow and entirely separated from each 

 other by the anterior. Scales in 27 rows. Ventrals 214 ; anal 

 entire ; snbcnudals 54. Pale brownish above ; two yellow lines on 

 each side of the head ; lower parts white. 



Total length 350 millira. ; tail 50. 



Damaraland. 



a. Ilgr. (V. 214; C. 54). Damaraland. (Type.) 



9. Boodon olivaceus. 



Holuropholis oHvaceus, ^-I. i>;/7». 7?fr. et Mag. Zool. 185(5, p. 4f)r), 

 and Arch. Mus. x. 1859, p. 196, pi. xvi. fig. 1 ; Giinth. Cat. p. :200 

 (1858). 



Boodon poensis, Giinth. Ann. 8,- Mac/. N. H. (G) i. 1888, p. 330. 



olivaceus, Bonleng. Ann. Mus. Geneva, (2) xii. 1891, p. 15. 



Eye rather small. Kostral broader than deep, just visible from 

 above ; internasals much shorter than the praefrontals ; frontal once 

 and a half as long as broad, as long as its distance from the end of 

 the snout, as long as or a little shorter than the parietals ; loreal 

 longer than deep : one or two praeoculars, usually in contact with the 

 frontal; temporals 1-|- 2 ; eight upper labials, fourth and fifth or 

 third, fourth, and fifth entering the eye : three or four lower labials 

 in contact with the anterior chin-shields, which are longer than 

 the posterior. Scales in 25 or 27 rows. Yentrals 191-214 : anal 

 entire ; subcaudals 40-55, single. Uniform blackish brown, belly 

 usually lighter brown, or with a yellowish median stripe. 



Total length 850 millim. ; tail 110. 



West Africa. 



ff, h. c? (Sc. 25; V. 194; Niger Expedition. 



C. 53) & hgr. (Sc. 27 ; 



V. 210; C.40). 

 c. 2 (Sc. 27; V. 208; Old Calabar. D. G. Rutherford, 



C. 43). Esq. [C.]. 



d-f. c? (Sc. 25; \. 191 ; Cameroons. Fischer Collection. 



C. 53), 2 (Sc. 27; 



V. 206 ; C. 44), & vg. 



(Sc. 25; V. 204; C. 42). 



