New Species of Lizard. 459 



extremity. Of the toes, the first (answering to the thumb) is the 

 shortest, the fifth next in length, then the second, the third, and 

 the fourth the longest. 



The scales of the outer part of the hinder legs are much ele- 

 vated and almost spiny ; those of the inner surface smooth. The 

 toes follow the same gradation with respect to their length as those 

 of the forefeet; the outer or fifth toe is very much separated 

 from the fourth, and is united to the metatarsus in a lateral direc- 

 tion, considerably higher up than the others. 



The femoral pores are fouiteen on each side, extending from 

 near the centre, about two lines anterior to the opening of the 

 cloaca, along the inner side of the thigh, through nearly its whole 

 length. 



The tail is large, depressed, slightly carinated above to a short 

 distance from the base, and tapering gradually to the extremity. 

 The scales which cover it on the upper part and sides are very 

 large and strong, each terminating behind in a sharp elevated 

 spine. Those of the under surface are smooth, of a smaller size 

 and closely imbricated. The whole are arranged in about eigh- 

 teen distinct rings, becoming gradually thicker and deeper, and 

 the upper scales larger and more strongly spined towards the ex- 

 tremity. Those of the sides, are also larger and more prominent 

 than the others ; on the under side, each ring is partially covered 

 by the segment of another band of similar scales, which is also the 

 case on the upper part with the rings nearest the base. 



The following are the dimensions of the animal, and of some of 

 the principal parts, in inches and decimals of an inch. 



Total length from the nose to the end of the tail 11-? 



Length of the head 15 



Width of the head at the ears 13 



Length of the body from the occiput to the origin 



of the tail 57 



Length of the tail 45 



Width of the tail near the base 1-4 



Length of the longest caudal scale "4 



Length of the fore leg and foot 2-8 



Length of the fourth or longest toe -6 



