44, noovon, 335 
S. Boodon mentalis. 
Boodon mentalis, Giinth. Ann. § Mag. N. H. (6) i. 1888, p. 331, 
pl. xix. fig. A. 
Eye moderate. Rostral fully twice as broad as deep, not visible 
from above, forming a broad suture with the internasals, which are 
a little shorter than the prefrontals; 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 
preocular, in contact with the frontal ; two postoculars ; temporals 
142; 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; subcaudals 54. Pale brownish above ; two yellow lines on 
each side of the head ; lower parts white. 
Total length 350 millim. ; tail 50. 
Damaraland. 
a. Hgr. (V. 214; C. 54), Damaraland. (Type.) 
9. Boodon olivaceus. 
Holuropholis olivaceus, A. Dum. Rev. et Mag. Zool. 1856, p. 466, 
and Arch, Mus, x. 1859, p. 196, pl. xvi. fig. 1; Giinth. Cat. p. 200 
1858). 
Boodon poensis, Giinth. Ann. § Mag. N. H. (6) i. 1888, P 330. 
—— olivaceus, Bouleng. Ann. Mus, Genova, (2) xii. 1891, p. 15, 
Eye rather small. Rostral broader than deep, just visible from 
above ; internasals much shorter than the prefrontals ; 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 preoculars, usually in contact with the 
frontal ; temporals 142; 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—55, single. Uniform blackish brown, belly 
usually lighter brown, or with a yellowish median stripe. 
Total length 850 millim. ; tail 110. 
West Africa. 
a,b. d (Se. 25; V. 194; Niger Expedition. 
C. 53) & hgr. (Se. 27 ; 
V. 210; C. 40). 
ce. 9 (Sc. 27; V. 208; Old Calabar, D. G. Rutherford, 
C, 4 Esq. O} 
d-f. & (Sc. 25; V. 191; Cameroons. Fischer Collection. 
