SAURIA— IGUANIDAE— PHRYNOSOMA DOUGLASS!. 591 



PLEURODONTA. 



TGUANIA. 



IGUANIDAE. 



C. Phrynosoma douglassi, (Bell) Gray. 



a. DOUGLASSI. 



Agama douglassii, Bell, Traus. Linn. Soc, xvi, 1S2S (1S33), 105, pi. 10. — Harlan, Med. 



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

 Phrynosoma douglassi), GRAY, Griffith's An. King., ix, 1S31, 44. — Wagl., Nat, Syst. 



Amphib., 1830, 146.— Wiegm., Herp. Mex., 1834, 54.— Holb., N. A. Herp., 



i, 1842, 101, pi. 14.— De Kay, Zool. N. Y., 1842, 31.— Gray, Cat. Brit, 



Mus., 1845, 227,-Gir., Stans. Rep. Exp. Great Salt Lake, 1852, 362, pi. 



7, figs. 6-9. Cope, Proc. Acad. Nat. Sci. Phila,, 18G6, 302.— Allen, Proc. 



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

 Tapaya douglassii, GiR., Herp. U. S. Exp. Exped., 185S, 398, pi. 21, figs. 1-5.— Bd., 



P. R. R. Rep., x, 1859, Gunnison's & Beckwith's Route, Reptiles, 18. — 



Id., P. R, R. Rep., x, 1S59, Williamson's & Abbott's Route, Reptiles, 9.— 



Coop. & Suckl., Nat. Hist. Wash. Terr., 1860, 294. 

 Tapaya brevirostris, GiR., U. S. Exp. Exped., 158, 377.— Bd., P. R. R. Rep., x, 1859, 



Gunnison's & Beckwith's Route, Reptiles, 18. 

 Phrynosoma brevirostris, Cope, Proc. Acad. Nat. Sci. Phila,, 1866, 302. 



b. ornatissimum. 



Phrynosoma orbiculare, Hallow., Sitgreave's Exp. Zufii & Col. Riv., 125, pis. 8, 9 



(not of Wiegmann). 

 Tapaya omatissima, Gir., IT. S. Exp. Exped. Herp., 1S5S, 396. — Bd., P. R. R. Rep., 



x, 1859, Whipple's Route, Reptiles, 3S. — Id., 17. S. & Mex. Bound. Surv., ii, 



pt. ii, 1859, Reptiles, 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. 



