ORDER SAURIA. l63 



the head ; but they are distinguished from the first 

 because they want hind feet, and from the second, 

 because they have fore feet. 



But one is known, from Mexico. 



Bipede Cannele, Lacep. ; Cliammsaura Propus, Schn. ; 

 Lacerfa Lumhricoides^ Shaw, Lacep. I, xH. 



With two short feet with four toes each, and a ves- 

 tige of a fifth, pretty completely organized in- 

 ternally, and attached by omoplates, clavicles, and a 

 small sternum ; but the head, vertebrae, and in a 

 word, all the rest of the skeleton, resembles that of 

 the amphisbenae. 



It is about eight or ten inches long, and is as 

 thick as one's little finger ; flesh-coloured, covered 

 with about two hundred and twenty semi-rings on 

 the back, and as many under the belly, which meet 

 in turning on the side. It is found in Mexico, 

 where it lives on insects. Its tongue but little ex- 

 tensible, is terminated by two small corneous points. 

 The eye is very small, the tympanum covered by 

 the skin, and invisible without. In front of the 

 anus are two lines of pores. I have found but one 

 large lung, and a vestige of a small one, as in the 

 majority of serpents.* 



* The genera which terminate this order of Saurians, interpose, in 

 various manners, between the common Saurians and the genera placed 

 at the head of the order of Ophidians ; so much so, that many naturalists 

 do not think that these two orders should be separated, or that one should 

 be formed, including, on the one hand, the Saurians, with the exception 

 of the crocodiles, and on the other, the Ophidans of the family of anguis. 



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