44. BooDON. 335 



S. Boodon mentalis. 



Boodon mentalis, Gilnth. Ann. ^ Mag. N. H. (6) i. 1888, p 33] 

 pi. XIX. tg. A. ' If! 



Eye moderate. _ Eostral fully twice as broad as deep, not visible 

 trom above, forming a broad suture with the internasals, which are 

 a little shorter than the praefrontals ; 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 

 prsocular m 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 chm-shields very narrow and entirely separated from each 

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

 entire; subcaudals 54. Pale brownish above ; two yeUow lines on 

 each side of the head ; lower parts white. 



Total length 350 millim. ; tail 50. 



Damaraland. 



a. Hgr. (V. 214; 0. 54). Damaraland. 



(Type.) 



9. Boodon olivaceus. 



Holuropholis olivaceus, A. Dum. Bev. et Mag. Zool. 1856, p. 406, 

 and Arch. Mies. x. 1859, p. 196, pi. xvi. fig. 1 : Gilnth. Cat. p. 20o' 

 (1858). >f >.f 6 , H w^ 



Boodon poensis, Gilnth. Ann. Sf Mag. N. H. (6) i. 1888, p. 330. 

 olivaceus, Bouleng. Ann. Mus. Genova, (2) xii. 1891, p. 15. 



Eye rather small. Eostral 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. Ventrals 191-214 : anal 

 entire ; subcaudals 40-65, single. Uniform blackish brown, belly 

 usually lighter brown, or with a yellowish median stripe. 



Total length 850 millim. ; tail 110. 



West Africa. 



a, b. cJ (Sc. 25 ; V. 194 ; Niger Expedition. 



0. 63) & hgr. (Sc. 27 ; 



V. 210; C. 40). 

 V. 2 (Sc. 27; V. 208; Old Calabar. I). G. Rutherford, 



C. 48). Esq. [C.]. 



<?-/■. c? (Sc. 25; V. 191 ; Cameroons. Fischer Collection. 



0. 53), $ (Sc. 27; 



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



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



