﻿378 3. 1GUANIDM 



Phrynosoma douglassii ornatissimum Yarrow, Surv. W. iooth Merid., 

 Vol. V, 1875, p. 581 (part); Cope, Report U. S. Nat. Mus., for 

 1898, 1900 p. 415, fig. 71 (part); Ditmars, Reptile Book, 1907, 

 p. 148; Bryant, Univ. Cal. Pubis. Zool., Vol. 9, No. 1, 1911, p. 5. 



Phrynosoma hernanJesi Stejneger, N. Amer. Fauna, No. 3, 1890, p. 

 112 (part); Cockerell, Science, Ser. 2, Vol. XIV, 1901, p. in (?); 

 Cockerell, Univ. Colorado Studies, Vol. VII, No. 2, 1910, p. 131 ; 

 Ellis & Henderson, Univ. Colorado Studies, Vol. X, No. 2, 1913, 

 p. 72, pi. Ill, figs. 12, 14; Ruthven & Gaige, Occas. Papers Mus. 

 Zool. Univ. Michigan, No. 8, 1915, p. 23. 



Phrynosoma ornatissimum Stejneger, N. Amer. Fauna, No. 3, 1890, 

 p. 115, pi. XII, figs. 3a-3c; Cary, N. Amer. Fauna, No. 33, 1911, 

 pp. 21, 23, 26; Stejneger & Barbour, Check List N. Amer. Amph. 

 Rept., 1917, p. 60. 



Phrynosoma douglassii hernandesi Cope, Report U. S. Nat. Mus. for 

 1898, 1900, p. 413 (part); Richardson, Proc. U. S. Nat. Mus., 

 Vol. 48, 1915, p. 423. 



Phrynosoma douglassii brevirostre Stone, Proc. Acad. Nat. Sci. Phila., 

 191 1, p. 229 (part). 



Phrynosoma hernandesi ornatissimum Ellis & Henderson, Univ. Colo- 

 rado, Bull., Vol. XV, No. 6, 1 91 5, p. 260. 



Phrynosoma hernandesi hernandesi Ellis & Henderson, Univ. Colorado 

 Bull., Vol. XV, No. 6, 1915, p. 260. 



Phrynosoma douglassii ornatum Stejneger, Coneia. No. 65, 1919, p. 3. 



Description. — Nostrils opening on lines joining super- 

 ciliary ridges with end of snout. Gular scales small and 

 nearly equal-sized. A series of enlarged sublabial scales 

 not much larger than infralabials, separated posteriorly 

 from latter by several rows of granules. Head-spines 

 short} four or five temporals, one occipital, and one postor- 

 bital on each side. Occipital spines usually nearly erect, 

 supralabials small but prominent. Infralabials slightly 

 larger than supralabials, and continued farther back, becom- 

 ing gradually spinose. Other head scales small, irregular 

 in size and arrangement, flattened or more or less convex, 

 and roughened with ridges and granulations. Two groups 

 of spines on side of neck, upper being larger. Back, tail, 



