4C0 Mr. Bell's Description of a new Lizard. 



Length of the shortest toe '3 



Length of the hind leg: and foot 3"5 



Length of the longest toe "8 



Length of the shortest toe '3 



In consequence of the individual in my possession having been 

 kept in spirits, and become very flabby, it is impossible accurately 

 to ascertain the circumference of the body; on fully inflating the 

 lungs however, I found it about six inches. 



The colour has become nearly oliliterated by long preservation 

 in spirits. The whole of the body is mottled, above and below, 

 the ground colour of the belly being tlie lightest part. The tail 

 is brown above, lighter underneath, and the scales on the upper 

 part are mottled somewhat like tortoise-shell. Another specimen 

 which was stuffed and preserved in a dry state was similarly 

 mottled, but altogether of a lighter colour. 



The species, with which from mere verbal description, it is 

 most likely to be confounded, are Uromastyx ci/clurus,* Menem, 

 U. spinipes^^ U. coeruleus,^ and U. azureus || of that author. 

 From the first (which however is not the Quetz Paleo of La 

 Cepede as is erroneously stated by Merrem,) it differs in the 

 depressed form of the tail and the smoothness of its under surface, 

 whilst in that species the tail is round, and the under side as 

 well as the upper is spinous. From the second it is distinguished 

 by the form of the tail, which is round in U. spinipes. From U. 

 cceruleus it differs considerably in the proportion of the tail to 

 the body as well as in other characters, and from U. azureus 

 it will be readily known by the tuberculated surface of the back 

 and head, and the quadrate form of the tail in the latter species. 



* Le Lezard Quetz-Paleo. Lacep. Quadr. ovip. I. p. 497. Stellio Queiz- 

 Paleo. Daud. rept. IV. p. 26. 



+ Stellio spinipes. Daud. IV. p. 31. Geoffroy, Rept. d'Egypte. T. 2. 

 f.2.t 



X Stellio azureus. Latr. Rept. II. p. 34. Daud. IV. p. 36. T. 46. 



II L'azjire. Lacep. 1- p. 362. Stellio brevicaudatus. Daud. IV. p. 40. T. 47. 

 Latr. II. p. 29. 



