96 3. IGUANID.^ 



or very slightly spinose medially, laterally sometimes 

 keeled, and usually ending in an obtuse spine. Dorsals 25 

 to 31 to a head-length. Ventral scales smooth, a little 

 smaller than dorsals, about 128 to 150 rows between gular 

 fold and anus. Tail little longer than head and body, 

 conical, very stout,and covered with whorls of fairly large, 

 weakly keeled, spinose scalesj about 51 to 64 scales in a 

 whorl at largest part of tail. Scales on fore and hind limbs 

 rather bluntly spinose, sometimes keeled on distal part of 

 scale. Femoral pores very large in males, small in females, 

 varying in number from 12 to 19j average in 32 thighs, 

 16.35. 



The back and sides of the body are dull yellowish or 

 brownish olive with scattered dots, spots, blotches, or cross- 

 bars of black, blackish or reddish brown, yellow or grayish 

 yellow. The head, limbs and tail are yellowish or brown- 

 ish olive, unicolor or speckled on the limbs and cross-banded 

 on the tail with darker brown and yellow. The ventral 

 surfaces are dull brownish yellow, often darker brown or 

 slaty on the throat and chest, and sometimes speckled or 

 spotted on the limbs, chest and gular region with dark 

 brown. 



In the following table of measurements, the first speci- 

 men came from Santa Cruz Island, the second from San 

 Francisco Island, and the other four from Espiritu Santo 

 Island. 



Length to anus -125 137 139 165 170 172 



Length of tail 144 170 151 ....._ 198 



Snout to orbk _ 91^11 11 13 14 13 



Snout to ear 24 28 25 34 36 35 



Width of head 20 25 23 32 35 33 



Fore limb 51 59 54 66 72 7+ 



Hind limb 70 83 76 90 99 99 



Base of fifth to end of 



fourth toe 25 27 25 28 31 30 



