, aay = A wy et Se Oey RF ©. Pern we 
284 COLUBRID. 
1. Opisthotropis atra. 
Opisthotropis ater, Giinth. Ann. § Mag. N. H. (4) ix. 1872, p. 16, 
pl. iii. fig. B. 
Snout short and broad, much depressed, not projecting. Rostral 
much broader than deep, well visible from above; internasals a 
little longer than broad ; prefrontal single ; frontal large, as broad 
as long, thrice as broad as the supraocular, shorter than the 
parietals; loreal a little longer than deep; one prw- and two 
postoculars ; a very elongate anterior temporal ; eight upper 
labials, fifth entering the eye, seventh very long; two pairs of sub- 
equal chin-shields, anterior in contact with five labials. Scales in 17 
rows, smooth on the nape, feebly keeled on the body, rather strongly 
keeled towards the tail. Ventrals 170; anal divided; subcaudals 
65. Upper parts brownish black, lighter towards and on the 
abdomen. 
Total length 340 millim. ; tail 75. 
West Africa. 
a. 3 (V.170; ©. 65). W. Africa. (Type.) 
2. Opisthotropis andersonii. (Pxiare XVIII. fig. 3.) 
Calamohydrus andersonii, Bouleng. Ann. § Mag. N. H. (6) ii. 
1888, p. 44. : 
Opisthotropis andersonii, Bouleng. Ann. § Mag. N. H. (6) vii. 
1891, p. 343. 
Snout short and broad, much depressed, not projecting. Rostral 
much broader than deep, just visible from above ; internasals twice 
as long as broad; nasal cleft extending from the nostril to the 
second labial; a single prefrontal; frontal large, a little longer 
than broad, much shorter than the parietals; loreal much longer 
than deep; one pre- and one postocular; two small suboculars, 
separating the eye from the labials ; temporals 1+2; eight upper 
labials, fifth below the eye; only one pair of well-developed chin- 
shields, in contact with four labials. Scales in 17 rows, finely striated 
and feebly keeled. Ventrals 161; anal divided; subcaudals 58. 
Blackish olive above, each scale edged with whitish ; lower parts 
whitish, chin and lower labials brown. 
Total length 240 millim.; tail 45. 
Hong Kong. 
a. 3 (V.161; C. 58). Hong Kong. City Hall Museum, Hong 
Kong (E.]. (Type.) 
3. Opisthotropis rugosa. 
Lapin rugosus, v. Lidth de Jeude, in M. Weber, Zool. 
trgebn, ii. p. 187, pl. xvi. tigs. 1-5 (1890). 
rr ee rugosa, Bouleny. Ann. § Mag. N. H. (6) vii. 1891, 
p. 343. / 
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