38 CALIFORNIA ACADEMY OF SCIENCES. 



Order II. SQUAMATA. 



The order ^uwinata 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. 

 •.\. — Limbs well developed, peutadactyle. 

 b. — Ej'e 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. 



Eublepharidae. — p. 39. 

 -C". — Pupil round; top of head with plates or scales, not movable, 

 d. — A series of femoral pores. 

 £. — Lateral scales not abruptly smaller than ventrals; ventrals 

 in numerous series; tongue not deeply divided at tip. 



Iguanidae.— p. 42. 

 e^ — Lateral scales granular like dorsals, abruptly smaller than 

 ventrals; ventrals in eight longitudinal series; tongue 

 ending in two long slender points. 



Teiidae.— p. 132. 

 d^. — No femoral pores, 

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

 usually hidden by a lateral fold; dorsal scales keeled. 



Ang-uidae. — 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-. — Scales on body wart-like tubercles, usually bony, sepa- 

 rated by narrow granular spaces. 



Helodermatidae. — p. 120. 



b^. — Eye without lids; pupil elliptical Xantusiidae.— p. 122. 



a^. — Limbs absent (or rudimentary in Boidce). 

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



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

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



Anniellidae. — p. 115. 

 P. — 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 Leptotyphlopidae.— p. 150. 



