67. PHILOTHAMNUS. 101 
@ 9° (V..163; C. ea, 150), Lagos. (Type of A. lagoensis.) 
b. 3 (V. 165; C. 153). 2 (One of the types of A. nitida.) 
Possibly not specifically distinct from P. semivariegatus. 
3. Philothamnus dorsalis. 
Leptophis dorsalis, Bocage, Jorn. Sc. Lisb. i, 1866, p. 69. 
Ahvetulla dorsalis, Giinth. Ann. §& Mag. N. H. (4) 1. 1868, p. 424. 
Philothamnus dorsalis, Peters, Mon. Berl. Ac. 1876, p. 119; Bocage, 
Jorn. Sc, Lish, ix. 1882, p. 9, fig.; Boettg. Ber. Senck. Ges. 1888, 
p. 58. 
Rostral broader than deep, the portion visible from above mea- 
suring about one fourth its distance from the frontal; internasals 
as long as or a little shorter than the prefrontals ; frontal with 
concave lateral borders, once and a half to once and two thirds as 
long as broad, a little longer than its distance from the end of the 
snout, a little shorter than the parietals; loreal at least twice as 
long as deep; one preocular, in contact with or narrowly separated 
from the frontal; two postoculars; temporals 1+1; nine upper 
labials, fourth, fifth, and sixth entering the eye; five lower labials 
in contact with the anterior chin-shields, which are shorter than 
the posterior. Scales in 15 rows. Ventrals 170-190; anal divided ; 
subcaudals 118-145. Olive above, with a brown vertebral stripe ; 
snout yellowish brown; lower parts yellowish. 
Total length 840 millim.; tail 290. 
West Africa, from the Ogowé to Benguela. 
e Ove Li 5. ©.2). Lower Congo. M. A. Linden [C.]}. 
Gapeiors de (Vv. fais Angola. Prof. B. du Bocage [P.]. 
c. 141). 
Crea Ve LADS C. 1: 31). Angola. J. J. Monteiro, Esq. [P.]. 
d. dS (V. 179; C. 145). Carangigo, Dr. Welwitsch [P. |. 
end (V..184; C. 138). Benguela. Prof. B. du Bocage [P.]. 
4, Philothamnus thomensis. 
Ahetulla nitida, part., Giinth. Ann. § Mag. N. H. (3) xi. 1863, p. 286. 
Philothamnus thomensis, Bocage, Jorn. Sc. Lisb. ix. 1882, p. 11, fig. ; 
Bedriaga, Amph, et Rept. I. de la Guinée (Istituto, xxxix.), p. 29 
(1892). 
Rostral broader than deep, the portion visible from above mea- 
suring not more than one fourth its distance from the frontal ; 
internasals as long as the prefrontals; frontal with concave lateral 
borders, once and two thirds as long as broad, longer than its distance 
from the end of the snout, as long as the parietals ; loreal at least 
twice as long as deep; one preocular, in contact with or narrowly 
separated from the frontal; two postoculars ; temporals 141 or 
1+2,; nine upper labials, fourth, fifth, and sixth entering the eye; 
five lower labials in contact with the anterior chin-shields, which 
are shorter than the posterior. Scales in 15 rows. Ventrals 
