18. CNEMIDOPHORUS 539 



covered with small, nearly equal-sized granules. Tail long, 

 provided with rings of large, obliquely keeled scales. 

 Femoral pores varying from 16 to 20 on each thigh. 



The color above is dark yellowish brown, irregularly 

 marbled or reticulated with black, without any indication of 

 longitudinal markings even in the young. In the largest 

 specimens the black markings are obsolete or more or less 

 concealed by the dark ground color. The sides do not differ 

 in coloration from the backj there are no vertical bars on 

 the sides. The upper surfaces of the limbs are brown or 

 grayish olive, finely reticulated with black. The sides of 

 the head and neck are unicolor or faintly reticulated with 

 black. The tail is dark olive brown or blackish above, some- 

 times darkest along the keels of its scales. All the lower 

 surfaces are black or blackish brown, sometimes lighter on 

 the gular region, belly, hind limbs and base of tail, where 

 the ground color may be brownish gray or slate with or 

 without black margins on the plates of the belly and black 

 reticulations on the throat. 



Length to anus . 60 



Length of tail . 152 



Snout to ear 14 



Snout to interparietal 1 1 



Width of head 9 



Fore limb ._ . 21 



Hind limb 38 



Base of fifth to end of 



fourth toe 18 21 19 20 22 19 



Distribution. — San Pedro Martir Island, Gulf of Cali- 

 fornia, Mexico. 



Remarks. — This species seems most closely related to 

 C. canus. 



