71. Lerropuis. 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 flavigularis. 
Dendrophis flavigularis, Hallow. Proc. Ac. Philad. 1852, p. 205, 
Thrasops flavigularis, Hallow. Proc. Ac. Philad. 1857, p. 67; Peters, 
Mon. Berl. Ac. 1876, p. 119. 
aoe enya niger, Gitinth. Ann. § Mag. N. H. (4) ix. 1872, 
oO. 
eee pustulatus, Buchh. § Peters, Mon. Berl. Ac. 1875, p. 199. 
flavigularis, var. pustulata, Boettg. Ber. Senck. Ges. 1889, 
p- 279. 
Rostral with straight vertical sides, a little broader than deep, 
visible from above; internasals as long as the prefrontals; 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 preocular, 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 ; subecaudals 
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. 
ao (VY ae OF Bone Sierra Leone. ) 
ic (¥. 187% <o 132 Monrovia, Liberia. Christiania Museum. 
e 2 Vv. 203 ; C. 140). Gaboon. (Type of ZZ. niger.) 
d. Skul Cameroons. 
71. LEPTOPHIS. 
Leptophis, part., Bell, Zool. Journ. ii. 1825, p. 328; Dum. §& Bibr. 
Erp. Gén. vii. p. 528 (1854) ; Jan, Elenco sist. Ofid. p. 84 (1868) ; 
Cope, Journ. Ac. Philad. (2) viii. 1876, p. 182. 
Leptophis, Wagl. Syst. Amph. p. 183 (1830). 
Aheetula, part., Gray, Griff. A. K. ixt Syn. p. 93 (1831); Giinth. 
Cat. Col. Sn. p. 151 (1858). 
Dendrophis, part., Schleg. Phys. Serp. ii. p. 220 (1837). 
Thrasops, part., Cope, Proc. Ac. Philad. 1860, p. 556. 
Diplotropis, Giinth. Ann. § Mag. N. H. (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 
