The Horned Lizards 



GOODE'S HORNED LIZARD 



Phrynosoma goodei, (Stejneger) 



Goode's Horned Lizard is one of the smallest species of 

 the genus. It attains a slightly larger size than the P. modesium, 

 the Little Horned Lizard. The spiny scales of the back are 

 but slightly protruding and the general aspect is that of a toad- 

 like creature with quite smooth, granular skin. The ear drum 

 is covered xvith granular scales. Two rows of marginal, spiny 

 scales, but the lower is very fine and small. Scales of the ab- 

 domen perfectly smooth. 



The head spines are peculiar; they are of fair size, but 

 the two rear temporal horns are quite the size of the central 

 {occipital) horns. 



Colmiration. — Alcoholic specimens are grayish above and 

 white beneath. There is a blackish spot on each side of the 

 nape, and a series of black spots on each side of the back. The 

 abdomen is white and immaculate. 



Dimensions. — Total Length 4^ inches. 



Length of Head and Body 2I 



Distribution. — This is a desert species. It has been taken 

 in Sonora, Mexico, and possibly occurs in southern Arizona. 



THE SMOOTH HORNED LIZARD 



Phrynosoma plaiyrhinum, (Girard) 



This abundant species differs from the other horned lizards 

 having the ear drum covered with granular scales and possessing 

 a fairly smooth skin, in the structure of the head spines, which 

 are rudimentary. They are barely longer than the horizontal 

 diameter of the eye-opening. There are two single rows of 

 slightly enlarged scales on that portion of the chin embraced by 

 the sharp, projecting plates beneath the lower labials. Scales 

 of the abdomen smooth; two series of marginal, spiny scales 

 at the edge of the abdomen — the lower but slightly developed. 



Colouration. — Pinkish-gray or brownish-gray; a large, dark 

 patch on each side of the nape. The back is marked with dark, 

 wavy cross-bands, which may be very indistinct. Abdomen 

 immaculate white. 



Dimension. — ^Total Length 5 inches. 



Length of Head and Body 3^ " 



158 



