48 REPTILIA—SQUAMATA 



Class REPTILIA 



The reptiles of Western North America belong to two 

 great groups, to which they may be referred by the follow- 

 ing 



Synopsis of Orders 

 a. — Body not protected by a bony carapace j jaws provided 

 with teeth. (Lizards and snakes) 



Squamata. — p. 48. 



a'. — Body protected by a bony carapace or shell, covered 

 with horny plates or leathery skinj jaws homy, with- 

 out teeth. (Turtles) 



Testudinata. — p. 965. 



Order I. SQUAMATA 



The order Squamata contains the lizards and the snakes, 

 which are regarded as constituting two suborders — Sauna 

 and Serpentes. These suborders are very closely allied and 

 for convenience are treated together in the following: 



Synopsis of Families 

 a. — Limbs well developed, pentadactyle. 

 b. — ^Limbs four, both anterior and posterior present. 

 c. — Tips of digits dilated into disks or padsj eye with- 

 out lids. 



Cekkonidse. — p. 51. 



c*. — Tips of digits not broadened into disks or pads. 



d. — Eye with movable lids. 



e. — Pupil elliptical, vertical; skin of top of head 



soft, free from skull, and covered with minute 



granules which are not appreciably larger than 



those on the back. 



Eublepharidae. — p. 57. 



