42, BOTHROLYCUS, 325 
supraocular, as long as or slightly longer than its distance from the 
end of the snout, as long as the parietals; loreal elongate, separated 
from the eye by the lower preocular ; two (or three) preoculars, 
upper largest; two postoculars; temporals 2+3; seven or eight 
upper labials, fourth and fifth entering the eye; four lower labials 
in contact with the anterior chin-shields, which are as long as or 
longer than the posterior. Scales strongly keeled, in 23 rows 
Ventrals 190-205; anal entire; subcaudals 64-82. Head yel- 
lowish or reddish brown, with black spots and two pairs of oblique 
black lines, the outer passing through the eye ; body blackish brown, 
uniform, or with yellow lines ; lower parts uniform yellowish. 
Total length 920 millim. ; tail 165. 
West and Central Africa. 
A. Uniform blackish brown above. 
a. 2 (V. 205; C. 75). Fernando Po. (Type of B. brunnens.) 
B. With five yellowish longitudinal streaks, which are 
narrower than the interspaces. 
b. 2 (V. 195; C. 69). Oil River, W. Africa. H. geen Esq. 
<< 
ce. 2 (V. 194; C. 64). Akassa, mouth of Dr. J. W. Crosse [P.]. 
Niger. 
ge 
d, Hgr. (V. 190; C.66). Semumio, C. Africa. Hr. Bohndorff [C.]. 
C. With five yellowish longitudinal streaks, which are as 
broad as the interspaces, 
e. 2 (V. 202; C. 74). Ashantee. Mr. McCarthy [C.]. 
42. BOTHROLYCUS., 
Bothrolycus, Giinth. Proc. Zool. Soc. 1874, p. 444. 
Maxillary teeth 20, forming a continuous series, the six anterior 
strongly enlarged; anterior mandibular teeth strongly enlarged. 
Fig. 20. 
Maxillary and mandible of Bothrolycus ater. 
Head distinct from neck; eye rather small, with round pupil; 
loreal region deeply concave, the pit entering the eye. Body short, 
cylindrical ; scales smooth, without apical pits, in 19 rows; ventrals 
rounded, Tail very short; subcaudals in two rows. Hypapo- 
phywes developed throughout the vertebral column. 
est Africa, 
—e ee 
