38 CALIFORNIA ACADEMY OF SCIENCES. 



Order II. SQUAMATA. 



The order Squamata contains the lizards and the 

 snakes, which are regarded as constituting two sub- 

 orders Sauri and Serpentes. These suborders are very 

 closely allied, and for convenience are treated together 

 in the following 



SYNOPSIS OF FAMILIES. 

 u. Limbs well developed, pentadactyle. 

 b. Eye with movable lids. 



c. 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. 



Eublepharidse. p. 39. 



c 2 . Pupil round; top of head with plates or scales, not movable, 

 d. A series of femoral pores. 



e. Lateral scales not abruptly smaller than veutrals; ventrals 

 in numerous series; tongue not deeply divided at tip. 



Iguanidse. p. 42. 



e 2 . Lateral scales granular like dorsals, abruptly smaller than 

 ventrals; ventrals in eight longitudinal series; tongue 

 ending in two long slender points. 



Teiidse. p. 132. 

 d 2 . No femoral pores. 



f. Lateral scales very much smaller than dorsals and ventrals, 

 usually hidden by a lateral fold; dorsal scales keeled. 



Anguidse. p. 101. 

 f'-. Lateral scales not much smaller than dorsals and ventrals; 



no lateral fold; scales smooth, 

 g. Scales on body flat, thin, and imbricate. 



Scincidse. p. 143. 



g 2 . Scales on body wart-like tubercles, usually bony, sepa- 

 rated by narrow granular spaces. 



Helodermatidee. p. 120. 



b 2 . Eye without lids; pupil elliptical Xantusiidae. p. 122. 



a 2 . Limbs absent (or rudimentary in Boldce). 

 h. Ventral scales less than twice as broad as dorsals. 



i. Plates on top of head much larger than those on body; anus 

 bordered in front by several scales; no spine at end of tail. 



Anniellidse. p. 115. 



i 2 . Plates on top of head not larger than those on body; anus 

 bordered in front by a single plate; a small spine at end of 

 tail Leptotyphlopidee. p. 150. 



