1885. J NATURAL SCIENCES OF PHILADELPHIA. 147 



farther posteriorly than the occipitals ; inframaxillary plates 

 nearly equal ; one row of enlarged pointed gular scales upon each 

 side of, and distant from, the median line ; a single row of pyram- 

 idal scales at the periphery of the abdomen ; abdominal scales 

 carinated ; back spinous ; tail very short, about as long as the 

 femur, and with very few conical scales along the margins. 

 Habitat. — Puebla, Southern Mexico. 



9. Phrynosoma Braconnieri. 



Phrynosoma Braconnieri Dumeril & Bocourt, Miss. Sci. au Mex. et 

 Am. Cent. Rept., 1870, p. 233, pi. xii, fig. 7. 



Head as broad as long ; nostrils anterior ; cephalic spines of 

 medium size ; occipital spines somewhat less prolonged posteriorly 

 than the longest of the temporals ; four or five temporal spines 

 upon each side ; one row of enlarged pointed gular scales upon 

 each side of, and distant from, the median line; inframaxillary 

 plates nearly equal ; a single row of pyramidal scales at the 

 periphery of the abdomen ; abdominal scales carinated ; tail very 

 short, little more than half as long as the femur. 



Habitat. — Oaxaca, Southern Mexico. 



10. Phrynosoma platyrhinos. 



Phrynosoma platyrhinos Girard, Stans. Expl. Vail. Gt. Salt Lake, 1852, 



p. 361, pi. vii, fig. 1-5 ; Cope, Proc. Acad. Nat. Sci. Phila., 1866, p. 



oO'i ; Dumeril & Bocourt, Miss. Sci. au Mex. et Am. Cent. Rept., 



1870, p. 232 ; Cope, Check List N. A. Batrach. and Rept., 1875, p. 



49 ; Yarrow, U. S. Geol. Surv. west of the 100th Meridian, v, 1875, 



p. 577 ; Coues, in the above work, p. 594. 

 Doliosaurus platyrhinos Girard, Herp. U. S. Expl. Exped., 1858, p. 409 ; 



Baird, P. R. R. Rept., Gunnison & Beckwith's Route, Rept., 1859, 



p. 18. 



Head small ; nostrils anterior ; cephalic spines of medium size ; 

 occipital spines produced further than the longest of the tem- 

 porals, posteriorly ; sublabial plates nearly equal ; inframaxillary 

 plates becoming larger posteriorly ; one row of enlarged gular 

 scales on each side of, and distant from, the median line ; one 

 row of pyramidal scales at the periphery of the abdomen ; 

 abdominal scales smooth ; back with several rows of spinous 

 scales ; tail of medium length, fringed with conical scales. 



Habitat. — Utah, Nevada, New Mexico, Arizona and California. 



