May, 1845.] 245 



pentagonal, broadest posteriorly ; the posterior frontals are large and quadran- 

 gular; the anterior frontals are much smaller than the posterior, they are pen- 

 tagonal ; the supra-orbitar plates are hexagonal ; there are seven or eight supe- 

 rior labials, of Ihese the sixth is the largest; the eyes are very large and pro- 

 jecting; there is one anterior orbitar plate, which is quadrangular, and extends 

 from the eye to the nasal plate ; there are two nasal plates, with the nostril 

 placed between them, which is small ; the neck and body are slender, thickest 

 near the middle, and very much compressed ; the tail is of moderate length and 

 tapering ; the body and tail are covered above and upon the sides with smooth 

 quadrangular scales. 



Abdominal scuta 178 : subcaudal 96. 



Colour. — Predominating colour of head, body and tail, brownish mingled 

 with ash; a series of transverse bands or fascios, of a brown colour, margined 

 with white, extend across the body and tail from the neck to the extremity of 

 the latter ; those upon the body arc separated from each other by intervening 

 spaces on the upper half, about half an inch in length; under surface of chin, 

 throat, abdomen and tail, of a straw colour, with a row of brownish spots run- 

 ning along the centre of the latter ; they exist also, but are indistinct, upon the 

 neck ; the brownish transverse bands, above described, extend a short distance 

 upon the abdomen ; those on the lower half nearly meet; those on the tail meet 

 in the centre. 



Co lube ii atratus. 



Description. — Head small, depressed, covered above with nine plates ; the 

 rostral plate is hexagonal, incurvated beneath; the anterior frontals are quad- 

 rangular, the vertical small and hexagonal ; the occipital plates are pentagonal ; 

 there is a small quadrangular plate extending from the eye to the nasal plate ; 



the eye is small; the irides ; there are six plates upon the margin of the 



upper jaw, of these the fourth is the largest; the body is long and slender, 

 covered with small, quadrangular, carinated scales; the tail is short and 

 tapering. 



Abdominal scuta 145 : subcaudal 46. 



Colour. — A whitish band extends across the occiput ; upper part of body and 

 tail slate colour ; chin, throat, abdomen and tail, of a straw colour. 



Dimensions. 



Inches. 

 Length of the head, | 



Greatest breadth, .... a. 



Length of body, . . . inA 



Length of tail, r - - . 2* 



