ll. TRACHYBOA. 109 
o, - o 37; V. 183; Ternate. H.M.S. ‘ Challenger.’ 
mw. 2 (Sc. 33; V.175;  Misol. 
C. 48 
p. 2 & $3; V. 177; New Guinea,S.of Dr. Comrie [C.]. 
C, 41). Huon Gulf. 
“tg 45) . 89; V. 187; Solomon Islands. G. Krefft, Esq. [P.]. 
4, Enygrus asper. 
Erebophis asper, Giinth. Proc. Zool. Soc. 1877, p. 132, pl. xxi. ; 
Sauvage, Bull. Soc. Philom. (7) ii. 1878, p. 89; Peters §& Doria, 
Ann. Mus, Genov. xiii. 1878, p. 406, pl. iv.; Hubrecht, Notes 
Leyd. Mus. i. 1879, p. 19. 
Snout prominent, obliquely truncate; canthus rostralis angular. 
Rostral broader than deep, not visible from above; head-scales 
small, irregular, with small tubercles or short keels ; eight or nine 
scales from eye to eye across the forehead; eye surrounded by a 
circle of 13 or 14 scales; ten or eleven upper labials. Scales 
strongly keeled, the keels forming oblique lines; 33 to 39 scales 
round the thickest part of the bedy. Ventrals 131-146; anal 
entire ; subcaudals 15-21. Reddish brown above, with a dorsal 
series of large dark-brown, black-edged spots, which may be con- 
fluent into a zigzag band; yellowish beneath, uniform or with 
dark brown spots. 
Total length 730 millim.; tail 55. 
Misol, Salawatty, New Guinea, and Duke of York Island. 
a. 2 (Se. 33; V.140; C.16). Andai, N. Guinea. 
b. 2 (Se. 39; V.146; C. 20). Duke of York Isl. si = [C.]}. 
c. Skeleton. Duke of York Isl. 
11, TRACHYBOA. 
Trachyboa, Peters, Mon. Berl. Ac. 1860, p. 200. 
Enygrus, part., Jan, Icon. Gén. Ophid. p. 76 (1865). 
Anterior maxillary and mandibular teeth longest, gradually 
decreasing in size. Head distinct from neck, covered with scales ; 
no rostral shield; nostril in a single nasal. Eye moderate, with 
vertical pupil. Body compressed, Scales kee mA Tail short, pre- 
hensile; subcaudals single. 
South America. 
1. Trachyboa gularis. 
Trachyboa gularis, Peters, Mon. Berl. Ac. 1860, p. 200, pl. —. fig. 1. 
Enygrus is, Jan, Icon, Gén. p. 77, 1. 2, pl. ii. fig. 3 (1861). 
Snout scarcely prominent. Upper head-scales small, convex, 
keeled, a few on the snout transversely enlarged and smooth; eye 
1) 
