11. ENYALIOIDEs. 113 
about 12 longitudinal series of scales 
between the dorsal crest and the lateral 
BONES yy ph 4/5 brani acre eae 3 4. oshaughnessy?, p. 115. 
Ventral scales sharply keeled; a single 
series of larger scales on each side; 
dorsal scales extremely small ...... 5. microlepis, p. 115. 
B. Nuchal crest not continuous with 
dorsal ; supraciliary edge much pro- 
duced ; ventral scales sharply keeled 6. palpebralis, p. 116. 
1. Enyalioides laticeps. 
Enyalius laticeps, Guichen. in Casteln. Amér. Mér., Rept. p. 20, pl. v.; 
A, Dum. Arch, Mus. viii. p. 529. 
—— planiceps, Guichen. 1. c. p. 21, pl. vi. 
Head large, short, rounded, its length equalling nearly once and 
a third its width ; canthus rostralis and supraciliary edge angular, 
projecting ; nostril pierced below the canthus rostralis, nearer the 
orbit than the tip of the snout; tympanum vertically oval, as large 
as the eye-opening. Upper head-scales small, equal, tubercular, 
strongly keeled or subconical ; occipital scarcely enlarged ; eleven 
or twelve upper, and ten or eleven lower labials. Gular scales, 
uniform large oval smooth granules. Nuchal crest formed of large 
conical scales, the largest being nearly as long as the vertical 
diameter of the tympanum; on the back, the crest becomes very 
low, and is reduced to a feebly serrated ridge. Dorsal and lateral 
scales very small, equal, subrhomboidal, juxtaposed or feebly imbri- 
cate, feebly keeled; ventrals larger, squarish, smooth or indistinctly 
keeled. Limbs long, covered with equal, keeled scales ; the adpressed 
hind limb reaches the anterior border of the orbit; digits long and 
slender, feebly denticulated. Three femoral pores on each side. Tail 
feebly compressed, oval in section, not crested, covered with subequal 
keeled scales, largest inferiorly ; the length of the tail equals nearly 
twice that of head and body. Green above, with irregular brown 
spots ; tail with regular brown annuli; throat green, belly white. 
Total length .......... 352 millim. 
M680 aisacgi ete air ewes 32. —C,, 
Width of head ........ 25 35 
Body; accaritesursne nied eas 90 Cx, 
Fore limb ............ 66, 
Hind limb............ 113—CO*#,, 
Pa ae tabieda aerate’ 230, 
Upper Amazons. 
a. Q. Pallatanga, Ecuador. Mr. Buckley [C.]. 
2. Enyalioides prestabilis. 
Enyalius prestabilis, O’Shaughn. Proc, Zool, Soc. 1881, p. 240, pl. xxv. 
fig. 1. 
Head large, nearly once and a half as long as broad; canthus 
VOL. II. I 
