SAUEIA IGUANIDAE PHEYNOSOMA DOUGLASSI. 591 



PLEURODONTA. 



IGUANIA. 



IGUANIDAE. 



6. Phrynosoma douglassi, (Bell) Gray. 



a. DOUGLASSI. 



Agama douglassii, BELL, Trans. Liun. Soc., xvi, 1828 (1833), 105, pi. 10. HARLAN, Mecl. 



& Phys. Ees., 1835, 141, f. 3. 

 Phrynosoma douglassii, GRAY, Griffith's An. King., ix, 1831, 44. WAGL., Nat. Syst. 



Atnpbib., 1830, 146. WIEGM., Herp. Mex., 1834, 54. HOLE., N. A. Herp., 



i, 1842, 101, pi. 14. DE KAY, Zool. N. Y., 1842, 31. GRAY, Cat. Brit. 



Mus., 1845, 227. -GiR., Stans. Eep. Exp. Great Salt Lake, 1852, 362, pi. 



7, figs. 6-9. COPE, Proc. Acacl. Nat. Sci. Phila., 1866, 302. ALLEN, Proc. 



Bost. Soc. Nat. Hist., xvii, 1874, 69. COPE, Check-List, 1875, 49. 

 Tapaya douglassii, GIR., Herp. U. S. Exp. Exped., 1858, 398, pi. 21, figs. 1-5. BD., 



P. E. E. Eep., x, 1859, Gunnison's & Beckwith's Eoute, Eeptiles, 18. 



Id., P. E. E. Eep., x, 1859, Williamson's & Abbott's Eoute, Eeptiles, 9. 



COOP. & SUCKL., Nat. Hist. Wash. Terr., 1860, 294. 

 Tapaya Irevirostris, GIR., U. S. Exp. Exped., 158, 377. BD., P. E. E. Eep., x, 1859, 



Gunnison's & Beckwith's Eoute, Eeptiles, 18. 



Phrynosoma Irevirostris, COPE, Proc. Acad. Nat. Sci. Phila., 1866, 302. 



&. ORNATISSIMUM. 



Phrynosoma orMculare, HALLOW., Sitgreave's Exp. Zuni & Col. Eiv., 125, pis. 8, 9 



(not of Wiegrnaun). 

 Tapaya ornatissima, GIR., U. S. Exp. Exped. Herp., 1858, 396. BD., P. E. E. Eep., 



x, 1859, Whipple's Eoute, Eeptiles, 38. Id., U. S. & Mex. Bound. Surv., ii, 



pt. ii, 1859, Eeptiles, 9. 

 Phrynosoma^ douglassii, subsp. ornatissimum, COPE, Check-List, 1875, 49. 



Numerous specimens in my collection, from various parts of New 

 Mexico and Arizona. One of them, No. 407,* from Bero Springs, N. Mex., 

 between Fort Wingate and the Rio Grande, was formerly identified by Pro- 

 fessor Cope with P. brevirostre, which, however, appears to be not a tenable 

 species. 



This round bodied and plain looking species, with the cephalic spines 



rudimentary, exhibits a wide range of variation in color. Some specimens 



are uniform brown above ; others have dark cross bars, with light hinder 



edges, or dark oval spots, yellow-margined or not ; in some the spines and 



* Numbers of specimens throughout this article refer to my field-register. 



