ONYCHOCEPHALUS BIBRONII.— Smith. 
Reptilia. — Plate LI. Fig- 2. 
0. superne pallide aurantio-brunneus, maculis subalbis parvis in lineis longitudinalibus 
apice subcuneato ; scuto rostral! magno latoque ; oculo partim in scnto preoculan partrm in 
et partim in supraoculari j scuto preocnlari subovato; caud& breve, curvata et aculeata. 
Colour.— The upper and lateral parts of the head, body, and tail inter- 
mediate between yellowish and orange coloured brown, the tint rat er 
pale with a strong lustre; the under parts intermediate between ochre- 
yellow and wood-brown. The scales, both of the superior and interior 
parts with a faint white or yellowish white spot on the hinder edge about 
equidistant from their extremities, the spots are arranged in ongitu ina 
rows, and in some specimens are very manifest. 
Form, &c.— The head and the anterior, and middle portions oi the 
body, slightly flattened, the hinder portion towards tail, and the latter itse 
cylindrical ; thickness rather greatest about the middle of the body, 
considerably less close to and at the head, as also at the point of the tai 
the latter is curved downwards, and its length less than its diameter. Hea 
above and below flat, in front somewhat wedge shaped. Rostral plate very 
wide its hinder edge immediately over the eyes ; the edges of the portion 
on the under surface of the nose waved, and only a very narrow part of lie 
hinder edge enters into the formation of the lip ; nostrils in the nasal 
suture • fronto-nasal plate much broader below than above, where it is 
separated from its fellow of the opposite side by the anterior froivtal plate 
Xh is wide and short; preocular plate subovate, the posterior edge more 
arched than the anterior; ocular plate pointed superiorly where i joins 
the supraocular, wide and nearly square mfenorly, its hinder edge slightly 
arched ; frontal, parietal, supraocular and interparietal plates nearly equal 
in size and differing but little in form. Eyes partly in the preocular, 
