144 PROCEEDINGS OF THE ACADEMY OF [1885. 



Phrynosoma Blainmllei Gray, Beechey's Voy. Pacif. Zool., 1839. p. 96> 

 pi. xxix, fig. 1 ; Gray, Cat. Liz. Brit. Mus., 1845, p. 228 ; Cope, Check 

 List N. A. Batrach. and Kept., 1875, p. 49; Yarrow, U. S. Geol. 

 Surv. west of 100 Meridian, v, 1875, p. 582. 



Batrachosoma coronatum Fitzinger, Syst. Kept., i, L843, p. 79 ; Girard, 

 Ilerp. U. S. Expl. Expecl., 1858, p. 400, pi. xx, figs. 10-13; Dumeril 

 & Bocourt, Miss. Sci. an Mex. el Am. Cent., 1870, p. 239, pi. xii, 

 fig. lit. 



Eead la rue ; nostrils lateral ; cephalic spines strongly developed ; 

 occipital spines separated from each other by a single plate or 

 small spine, directed horizontally backward, beyond the longest 

 temporals; snblabial plates small; a large flattened scale at the 

 angle of the mouth ; inframaxillary plates beneath it very small, 

 the others large and sharp-edged ; three or four rows of enlarged 

 pointed gular scales upon each side of, and separated by, the 

 median line ; two rows of pyramidal scales at the periphery of 

 the abdomen ; abdominal scales smooth ; back spinous ; tail of 

 ordinaiy length, similar to the body, fringed with conical spines. 



Habitat. — Oregon and California. 



In coronatum the plate or scale that separates the two occipital 

 -j lines shows intermediate gradations between a nearly flattened 

 and a tubercular and even spiny surface. Therefore, the posses- 

 sion of a flattened scale by a specimen, which was the leading 

 character upon which Blainvillei was established, loses its impor- 

 tance and necessitates its incorporation with the species under 

 consideration. 



:>. Phrynosoma asio. 



Phrynosoma asio Cope, Proc. Acad. Nat. Sci. Phila., 18G4, p. 178 ; 



Sumiclirast, Bibl. Univers. et Rev. Suisse, 1873, p. 258; Sumichrast, 



Bull. Soc. Zool. Fr., 1880, p. 177. 

 Phrynosoma spinimentum Peters. Berlin Monatsb., 1873, p. 742. 

 Batrachosoma asio Dumeril & Bocourt, Miss. Sci. au Mex. et Am. 



Cent., 1870, p. 211, pi. xvii, fig. 0. 



Head large; nostrils lateral; cephalic spines well developed ; 

 occipital spines vertical, separated from each other by four or 

 five small plates; temporal spines separated from the occipitals, 

 and directed horizontally backward; sublabials small; infra- 

 maxillary plates increasing in size posteriorly; three or four 

 rows of enlarged pointed subgular scales on each side of, and 

 separated by, the median line; two rows of pyramidal scales at 

 the periphery of the abdomen; abdominal scales carinated; hack 



