ONYCHOCEPHALUS DELALANDII. — Dum. and Bib. 
Reptilia. — Plate LL Fig. 1. 
O. superne paliide flavo-brunneus, infra ochraceus ; caudi breve curvata aculeataque ; scutis tribus in 
medio capitis superne formes fere corporis squamarum ; scuto rostrali antice lato, margine acuto et 
prominente ; oculo in scuto oculari in angulam inter scutum supraocularem et parietalem. 
Typlops Delalandii, Scbleg. Abbild. Amp. page 38, pi. 32, fig. 17—20. 
Colour. — The upper and lateral parts of the body and tail a pale, clear, 
yellowish brown, each scale with a lightish spot on its hinder edge about 
equidistant from its extremities; those light spots being arranged in rows, 
produce a slightly variegated or chequered appearance in specimen, in which 
the tint is tolerably distinct. Under parts pale ochre-yellow. 
Form, &c. — Body long, slender, and cylindrical ; thickness nearly equal 
throughout, being about that of a swan’s quill ; head rather narrower than 
body ; tail conical, curved, and its point armed with a small spine. The 
head superiorly is slightly flattened, anteriorly wedge-formed, the rostral 
plate which shields it anteriorly, having a prominent cutting edge the entire 
width of the nose ; the head anteriorly acute. The rostral plate is large and 
extended, partly on the upper and partly on the lower surface of the head 
anterior to the mouth ; the portion above is of an oval form, the widest part 
in front, where it forms the cutting edge of the nose, the lower portion 
has the sides waved, and only a narrow square projection of its hinder edge 
enters into the formation of the lip. Nostrils on the under portion of 
the nose, and open downwards, subovate in form, placed transversely as 
regards the head, and cross the suture between the nasal and fronto-nasal 
plates. The fronto-nasal plate curved, and much narrower superiorly than 
where it is in contact with the nasal plate ; it is separated from its fellow of 
the opposite side by the intervention of the anterior frontal plate, which in 
form is somewhat six-sided, resembling the scales of the body, and like 
the frontal and interparietal plates, differs only from the scales by being con- 
