42. BOTHROLYCtIS, 325 



supraocular, as long as or slightly longer than its distance from the 

 cud of the snout, as long as the parietals ; loreal elongate, separated 

 from the eye by the lower prteocular ; two (or three) praeoculars, 

 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 

 V'entrala 190-205 ; anal entire ; suhcaudals 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 iJ'io millim. ; tail 105. 



West and Central Africa. 



A. Uniform blackish brown above. 



(I. 2 (V. 205 ; C. 75). Fernando Po. (Type of B. brnnnens.) 



B. With five yellowish longitudinal streaks, which are 

 narrower than the interspaces. 



b. 2 (V. 195; C. GJ). Oil River, \V. Africa. II. H. Johnston, Esq. 



[P.]. 



c. $ (V. 194 ; C. 64). Akassa, mouth of Dr. J. W. Crosse [P.]. 



Niger. 

 (I. Ilgr. (V. 100; C. 66). Sem.uio, C. Africa. Hr. Bohndortf [C.]. 



C. With five yellowish longitudinal streaks, which are as 

 broad as the interspaces. 



e. $ (V. 202 ; C. 74). Ashantee. Mr. McCarthy [C.]. 



42. BOTHROLYCUS. 

 Bothrolycus, G'dnth. Proc. Zool. Sue. 1874, p. 444. 



Maxillary teeth 20, forming a continuous series, the six anterior 

 strongly enlarged ; anterior mandibular teeth strongly enlarged. 



Yvi. 20. 



Maxillary and mandible of Bothroli/ciis 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- 

 physes developed throughout the vertebral column. 

 West Africa. 



