SQUAMATA 49 



e'. Pupil round j top of head with plates or scales, 



not movable. 



f . A series of femoral pores, 

 g. Lateral scales not abruptly smaller than ven- 

 trals; ventrals in numerous series; tongue not 

 deeply divided at tip. 



Iguanidae. p. 61. 



g* Lateral scales granular like dorsals, abruptly 

 smaller than ventrals; ventrals in eight longi- 

 tudinal series 5 tongue ending in two long 

 slender points. 



Teiidae. p. 489. 

 f. No femoral pores. 



gg. Lateral scales very much smaller than dor- 

 sals and ventrals (usually hidden by a 

 lateral fold) ; dorsal scales keeled. 

 Anguidas. p. 433. 



gg\ Lateral scales not much smaller than dorsals 



and ventrals; no lateral fold 5 scales smooth. 



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



Scincidae. p. 577. 



h*. Scales on body wart-like tubercles, usually 

 bony, separated by narrow granular spaces. 

 Helodermatidae. p. 470. 



d*. Eye without lids; pupils elliptical. 



Xantusiidae. p. 476. 

 b\ Limbs two, anterior pair only present. 



Bipedidas. p. 597. 



a*. Limbs absent (or rudimentary in Boidx). 

 bb. Tail cylindrical or conical, not oar-shaped. 

 cc. Ventral scales less than twice as broad as dorsals, 

 dd. Plates on top of head much larger than those 

 on body; anus bordered in front by several 

 scales; no spine at end of tail. 



Anniellidae. p. 464. 



