^04 Mr. G ray on the Genera of Reptiles, [Sept. 



2. Lepto'stermon, Wagler. 



Head and chest shielded ; body covered with rings of square 

 scales ; anus without any pores. 



L. microcephalus, Wagler 10, t. 26, f. 2. 



Fanu V. CrtALciDiD.E. 



Body cyHndrical, covered with rings of uniform square scales ; 

 legs two or four ; head shielded ; tongue . . . . ; teeth . . . . ; anus 

 transverse submedial ; drum of the ear hidden. 



1. Chirotes, Cmv. Bipes, Xfl^r. Bimanus, 0/)/)e/. 

 Legs two, posterior ; toes five, clawed. 



C. canaliculatus, Merrem, La Cannell, Lacep. Lacerta lum- 

 bricondes, Shaw, 



2. Chalcides, Daud, Chalcis, Merrem, 

 Legs four ; toes three, clawed. 



C. flavescens, Bonnat. Le chalcide, Lacep, Chamaesaura 

 Cophias, Schneid, Chalcis Cophias, Merrem, 



3. Cophias, Gray, Colobus, Merrem, not Illiger, 

 Legs four ; toe one, clawed. 



C. Daudini, Gray, Colobus Daudini, Merrem, Chalcides 

 Monidactylus, Daud, 



Order IV, Ophidii, Brogniart, Serpentes, Lin. 

 The drum of the ear wanting ; eyes destitute of the third lid ; 

 skin covered with imbricate scale or plates; feet none; chest and 

 blade bones wanting; ribs encircHng the body; body of the 

 vertebra uniting by a convex and a concave surf\ice ; the os 

 tympanum or pedicel of the lower jaw moveable, and suspended 

 to another similar bone or mastoide, attached to the skull only 

 by ligaments. The branches of the jaw only united together by 

 ligaments, so as to let them separate more or less from 

 each other, and allow the animal to swallow large bodies ; the 

 palatine arches movable, armed with sharp recurved teeth. 



§1, Upperjaws with fangs anil/. Venati. 



The jaws are very dilatible ; the tongue very extensile; head 

 large behind ; the upper maxillary bones small, supported on a 

 long pedical, and very mobile, furnished with a fang, pieced 

 with a little canal, which give passage to the liquor secreted 

 by a considerable gland under the eye. The fang, when the 

 animal is not irritated, is hid in a plait of the palatine integu- 

 ments ; viviparous. 



Fain. I: Grotalid.'e. 



Body and tail covered beneath with simple transverse plates ; 

 head usually scaly. America. 



