LACERTILIA IGUANIDAE PHEYNOSOMA COENUTUM. 



579 



PHBYNOSOMA PLANICEPS, Hallow. 

 PLATE XXIV, FIG. 1. 



Phrynosoma .planiceps, HALLOW., Proc. Acad. Nat. Sci. Phila., 1852, 178. COPE, Check- 

 List N. A. Batrach. & Eept., 1875, 49. 



HAB. Southern Sonoran Subregion. 



As already remarked, this rare and interesting species has been lost 

 sight of since Gdrard's description was published. It was rediscovered in 

 1873 in Southeastern Arizona by Mr. Henshaw. 



PHEYNOSOMA COENUTUM, Harlan. 



Phrynosoma cornutum, HARLAN, Jour. Acad. Nat. Sci. Phila., iv, 1825, 299. GRAY, 

 Syn. Eept, Griff. Cuv., ix, 1831, 45. GIRARD, Stans. Eep. Exp. Great 

 Salt Lake, 1852, 360, pi. viii, figs. 1-0. BD., U. S. & Mex. Bound. Surv., 

 pt. ii, Eeptiles, 1859, 9. COPE, Check-List N. A. Batrach. & Eept., 1875, 49. 



HAB. Texas, Arizona, and New Mexico. 



This species resembles P. coronatum in having a double series of hori- 

 zontal pyramidal scales on the periphery of the abdomen. Occipital and 

 temporal spines more slender than in P. coronatum. Femoral pores incon- 

 spicuous, while in P. coronatum they are well marked. 



This is a southern form, not having been met with north of New 

 Mexico. 



