104 



colubeidj:. 



ventrals -with a suture-like lateral keel, and a notch on each side 

 corresponding to the keel. Tail long ; subcaudals in two rows. 

 West Africa. 



1. Hapsidophrys lineata. 



Hapsidophrys lineatus, Fischer, Abh. naturw. Ver. Hamh. iii. 1856, 

 p. Ill, pi. ii. tig-. 5; Gimth. Cat. p. 144 (1858) ; Jan, Icon. Gen. 

 33, pi. i. tig. 2 (1869) ; Mocquard, Bull. iioc. Philom. (7) xi. 1887, 

 p. 7t). 



Eostral broader than deep, just visible from above; internasals 

 as long as the prsefrontals ; frontal once and a half to once and two 

 thirds as long as broad, as long as or a little longer than its distance 

 from the end of the snout, as long as the parietals ; loreal at least 

 twice as long as deep ; one prseocular (rarely two), not touching the 

 frontal; two postoculars; temporals 2 -(-2 (rarely 1+2); eight 

 or nine upper labials, fourth and fifth or fifth and sixth entering 

 the eye ; tour to six lower labials in contact with the anterior chin- 

 shields, which are as long as or a little shorter than the posterior. 

 Scales in 15 rows, striated and keeled, the outer row without or 

 with a very faint keel. Ventrals 158-1 70 ; anal entire ; subcaudals 

 95-158. Upper parts striated black and green, each scale green 

 in the middle and black on the sides ; upper lip and lower parts 

 pale green or yellowish green. 



Total length llOU millira. ; tail 340. 



"West Africa. 



a. 2 (V. 170 ; C. 95). 

 b-c. $ (V. 167; C. 115) 

 & yg. (V. 167 ; C. 121). 



d. 6 (V. 167 ; C. 117). 



e. $ (V. 165; C.?). 

 /. Skeleton. 



Coast of Guinea. 

 Ancobra IJiver, 



Gold Coast. 

 Ancobra River. 

 Oil River. 

 W. Africa. 



Major Burton and Capt. 



Cameron [P.]. 

 Capt. Torry [P.]. 

 H. H. Johnston, Esq. [P.]. 



70. THRASOPS. 



Thrasops, Hallow. Proc. Ac. Philad. 1857, p. 67. 

 Thrasops, part., Cope, Proc. Ac. Philad. 1860, p. 556. 



Maxillary teeth 20 to 22, the three or four last longest and 

 Fig. 9. 



Maxillary and mandible of Thrasoiis flavigitlaris. 



separated from the rest by an interspace ; anterior mandibular teeth 

 feebly enlarged. Head rather short, distinct from neck ; eye large, 



