71. LEPTornis. 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. 



Dendrnphis flavigularis, ILdUnv. Prov. Ac. Philad. 18.52, p. 20o. 

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



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

 Hapsidophrys niger, Giinth. Arm. Sr Mag. N. IT. (4) ix. 1872, 



p. 2o. 

 Thrasops pustulatus, Biichh. ^ Peters, Mon. Berl. Ac. 1875, p. 199. 

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



p. 279. ' 



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

 visible from above ; internasals as long as the praefrontals ; 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 prajocular, 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 ; C. 130). Sierra Leone. 



b. c? (V. 187; C. l.!2). Monrovia, Liberia. Christiania Miispum 



c. 2 (V. 203 ; C. 140). Gaboon. (Type of H. nhjer.) 



d. Skull. Cameroons. 



71. LEPTOPHIS. 



Leptophis, part., Bell, Zool. Journ. ii. 1825, p. 328 ; Diim. Sf- Bibr. 



Erp. Gen. vii. p. .528 (18-54) ; Jan, Elenco sist. Ofid. p. 84 (1863) ; 



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

 Leptophis, ]Vaf;l. Si/st. Amph. p. 183(1830). 

 Ahietula, part., Gra,/, Gnff. A. K. ix. %m. p. 93 (1831); Gdnth. 



Cat. Col. 8n. p. lol (1858). 

 Dendrophis, part., Schlec/. Phys. Serp. ii. p. 220 (1837). 

 Thrasops, part., Cope, Proc. Ac. Philad. 18U0, p. 55(). 

 Liplotropis, Giinth. Ann. ^ Alag. N. H. (4) ix. 1872, p. 24. 



Maxillary teeth 20 to 32, posterior longest ; anterior mandibular 

 teeth longest. Head elongate, distinct Irom neck ; eye lar^e, with 

 round i)upil. Body slender, cylindrical or slightly compressed; 

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



