446 AMBLYCEPHALID 2. 
two postoculars; temporals 2+3 or 3+4; seven or eight upper 
labials ; last very long, none entering the eye ; first lower labial in 
contact with its fellow behind the symphysial ; three pairs of large 
chin-shields, broader than long. Scales in 15 rows, three dorsal rows 
slightly enlarged and more or less distinctly keeled, the keels 
sometimes hardly distinguishable. Ventrals 161-183; anal entire; 
subcaudals 57-80. Yellowish or reddish brown above, with 
blackish transverse spots or more or less regular cross-bars inter- 
rupted on the spine; a black line on each side of the head behind 
the eye, confluent with an X-shaped black blotch on the nape; an 
oblique black line from below the eye to the anterior border of the 
last upper labials; yellow beneath, dotted or striolated with 
blackish, or with a median blackish line. 
Total length 500 millim.; tail 115, 
Cochinchina, Burma, Java. 
a. 3 (V. 163; C, 65). Java. Leyden Museum, 
b. od (V. 175; C. 76). Java, ” CO. Bowring, Esq. 
P.}. 
ce, da. 3 (V. 165, 178; Java. 
C. 69, 80). 
e. 2 (V. 162; C. 57). Care Mts., Kediri, Baron y, Huegel [C.]. 
ava. 
f. do (V. 166; C. 71). Lao Mountains, M. Mouhot [C.}. 
g. & skeleton. Batavia. B_ Kinetic Esq. 
3. LEPTOGNATHUS. 
Dipsas, part., Wagler, Syst. Amph. p. 180 (1830); Sehleg. 8. 
Serp. i p- 257 (1837) ; Cope, Wiel Philad. 1880, Pp Sé0 
Leptognathus, Dum. §& Bibr. Mém. Ac. Sc. xxiii, 1853, p. 467, and 
Er . Gén, vii. p. 473 (1854). 
Chek tiopharus: Dum. §& Bibr, ll. ce. pp. 467, 478. 
Stremmatognathus, Diim. §& Bibr. ll. cc. pp. 468, 520. 
Anholodon, Dum. § Bibr. Erp. Gén. vii. p. 1165. 
Leptognathus, part., Giinth. Cat. Col. Sn. p. 177 (1858) ; Jan, Elenco 
sist, Ofid. p. 100 (1863) ; Cope, Proc. Ac. Philad. 1868, p. 107. 
Dipsadomorus, part., Jan, 1. c. p. 99. 
Mesopeltis, Cope, Proc. Ac. Philad, 1866, p. 818, 
Asthenognathus, Bocourt, Bull. Soc. Philom. (7) viii. 1884, p. 141. 
Neopareas, Giinth. Biol. C-Am., Rept. p. 178 (1895). 
_ Maxillary bone with the toothed border more or less turned 
inwards; teeth 11 to 18, equal or middle longest; mandibular 
teeth, anterior longest, gradually decreasing in length. Head 
distinct from neck; eye moderate or large, with vertical pupil; 
nasal entire or divided. Body more ‘or less compressed; scales 
smooth, without pits, more or less oblique, in 13 or 15 rows, 
vertebral row enlarged or not; ventrals rounded. ‘Tail moderate 
or long; subcaudals in two rows. 
Central and South America, 
