71. I.EPTOPHIS. 105 



with round pupil. Body more or less compressed; scales very 

 strongly overlapping, disposed obliquely, in 13 or 15 rows, the 

 laterals much shorter than the dorsals, which are keeled ; apical 

 pits present ; ventrals rounded, or with an interrupted lateral keel 

 posteriorly. Tail long ; subcaudals in two rows. 

 West Africa. 



1. Thrasops flavlgularis. 



Dendrophis flavigularis, Halloio. Proc. Ac. Philad. 1852, p. 205. 

 Thrasops flavigularis, Hallow. Proc. Ac. Philad. 1857, p. 67 ; Peters, 



Mon. Bed. Ac. 1876, p. 119. 

 Hapsidophrys niger, Gunth. Ann. Sf Mag. N. S. (4) ix. 1872, 



p. 25. 

 Thrasops pustulatus, Buchh. ^ Peters, Mon. Berl. Ac. 1375, p. 199. 

 flavigularis, var. pustulata, Boettg. Ber. Senck. Ges. 1889, 



p. 279. 



Eostral with straight vertical sides, a little broader than deep, 

 visible from above ; internasals as long as the prset'rontals ; frontal 

 a little longer than broad, scarcely broader than the supraocular, as 

 long as its distance from the rostral or the end of the snout and as 

 long as the parietals ; loreal as deep as long ; one prseooular, not in 

 contact with the frontal ; three postoculars ; temporals 1 + 1 ; eight 

 upper labials, fourth and fifth entering the eye ; chin-shields short, 

 the anterior in contact with four lower labials. Scales in 13 or 15 

 rows, dorsals keeled. Ventrals 179-206 ; anal divided ; subcaudals 

 130-140. Black, with or without yellowish spots on the back; lips 

 and throat yellowish or brownish white. 



Total length 1700 millim. ; tail 500. 



West Africa, from Sierra Leone to the Gaboon. 



a. 6 (V. 179 ; 0. 130). Sierra Leone. 



b. S (V. 187; 0. 132). Monruvia, Liberia. Christiania Museum. 



c. 2 (V. 203 ; C. 140). Gaboon. (Type of if. m^er.) 



d. Skull. Cameroons. 



71. LEPTOPHIS. 



Leptophis, part., Bell, Zool. Journ. ii. 1825, p. 328 ; Dum. ^ Bibr. 



Erp. G^n. vii. p. 628 (1854) ; Jan, Elenco sist. Ofld. p. 84 (1863) ; 



Cope, Jmirn. Ac. Philad. (2) viii. 1876, p. 132. 

 Leptophis, Wagl. Syst. Amph. p. 188 (1830). 

 Ahsetula, part., Grag, Griff. A. K. ix. Syn. p. 93 (1831) ; Giinth. 



Cat. Col. Sn. p. 161 (1858). 

 Dendrophis, part., Schleg. Phgs. Serp. ii. p. 220 (1887). 

 Thrasops, part. Cope, Proc. Ac. Philad. 1860, p. 656. 

 Uiplotropis, Gunth. Ann. ^ Mag. N. S. (4) ix. 1872, p. 24. 



Maxillary teeth 20 to 32, posterior longest ; anterior mandibular 

 teeth longest. Head elongate, distinct from neck ; eye large, with 

 round pupil. Body slender, cylindrical or slightly compressed ; 

 scales keeled or smooth, with apical pits, in 13 or 15 rows, disposed 



