Length to anus 59 



Length of tail 121 



Gular fold to anus 39 



Snout to ear 13 



Shielded part of head 12 



Width of head 10 



Fore limb 26 



Hind limb_, 40 



Base of fifth to end of 



fourth toe 16 17 17 17 18 19 



Distribution. — This lizard occurs abundantly on Socorro 

 Island, the largest of the Revilla Gigedo Islands, Mexico. 

 It, doubtless, is confined to this one island, for Clarion has 

 its own peculiar species and San Benedicto seems to have no 

 reptiles. 



37. Uta ornata lateralis (Boulenger) 

 Mexican Tree Uta 



Uta {Phymatolefis) lateralis Boulenger, Ann. & Mag. Nat. Hist., Ser. 



5, Vol. XI, 1883, p. 342 (type localities, Tres Marias Islands, 



and Presidio, Sinaloa, Mexico). 

 Uta lateralis Boulenger, Cat. Lizards Brit. Mus., Vol. II, 1885, p. 



214; GiJNTHER, Biologia Centrali-Amcr., Rept. &. Batrach., 1890, 



p. 61, pi. XXXI, fig. D; Schmidt, Amer. Mus. Novitates, No. 22, 



1921, p. 6. 

 Uta gularis Cragin, Bull. Washburn Lab., 1884, p. 7 (type locality, 



Guaymas, Mexico). 



Description. — Head and body considerably depressed. 

 Snout rounded but rather narrow, with well-developed 

 canthi, above which the nostrils open much nearer to end 

 of snout than to orbits. Plates on head moderately large, 

 smooth, convex or almost flat 5 interparietal largest. Fron- 

 tal plate usually divided transversely. Inner series of en- 

 larged supraoculars separated from frontal, frontoparietal 

 and parietal plates by one or two rows of granules. Super- 



