17. OPISTHOTROPIS, 283 / 
with small black spots; a dark streak on each side of the head, ) 
passing through the eye; a yellow lateral streak, edged with dark 
below, on the anterior portion of the body, posteriorly confluent 
with the yellow of the ventral region; yellow below, uniform or 
with dark brown spots or dots. 
Total length 680 millim. ; tail 160. 
Central America. ¢ 
a, b,c. 2 (V. 146, 149; C. 63, 64) Panama. Zoological Society. 
& yg. (V.134; C. 76). x 
e 
=* 
3. Tretanorhinus mocquardii. : 
Tretanorhinus mocquardi, Bocourt, Le Natur. 1891, p. 122. . 
A single prefrontal ; a single loreal; two preoculars ; anterior 
chin-shields in contact with each other anteriorly. Scales in 19 
rows. A yellow stripe along the flanks; lower parts fuliginous 
yellow. 
Central America. 
17. OPISTHOTROPIS. 
Opisthotropis, Giinth. Ann. § Mag. N. H. (4) ix. 1872, p. 16; 
B . Ann. & Mag. N. H. (6) vii. 1891, p. 343. 
Calamohydrus, Bouleng. Ann. §& Mag. N. H. (6) ii. 1888, p. 48. 
ae eepees, Mocquard, Le Naturaliste, 1890, p. 154, and Nouv, 
ch. Mus. (3) ii, 1890, p.141, and AMém, Soe, Zoo Fr. v. 1892, 
P 
Lepidognathus, v. Lidth de Jeude, in M. Weber, Zool. Ergebn, ii. 
p. 186 (1890). 
Maxillary teeth small, equal, 20 to 25; mandibular teeth small, ; 
equal. Head small, not distinct from neck ; eye small, with round 
upil; nostril directed upwards, in a divided or semidivided nasal, 
y cylindrical; scales finely striated and keeled, without apical 
pits, in 17 or 19 rows; ventrals rounded. Tail moderate; sub- 
caudals in two rows. Hypapophyses developed throughout the 
vertebral column. 
West Africa ; Southern China; Malay Archipelago. 
Synopsis of the Species. 
I. Scales in 17 rows; nasals separated by the internasals. 
Prefrontal single ; eight upper labials, fifth 
RNIN WENN DUO yids «os sales ca bses.ds 1. atra, p. 284. 
Prefrontal single; eight upper labials, none 
UNEELON SG OO vo a5 a cievie'nidieins ache cs 2. andersonii, p. 284. 
Two prefrontals ; twelve upper labials, none 
entering the eye.........+.ee0- esses 3. rugosa, p. 284. 
IL. Scales in 19 rows; nasalsin contact behind the rostral. 
4. typica, p. 285. 
sl 
