13. PHRYNOSOMA 431 



1887, p. 38; Gunther, Biologia Central i-Americana, Rept., 1890, 

 p. 79; Cope, Proc. Acad. Nat. Sci. Phila., 1892, p. 335; Van Den- 

 burgh, Proc. Cal. Acad. Sci., Ser. 1, Vol. 6, 1896, p. 342; Brown, 

 Proc. Acad. Nat. Sci. Phila., 1903, pp. 546, 552; Bailey, N. Amer. 

 Fauna, No. 25, 1905, p. 43; Ditmars, Reptile Book, 1907, p. 156; 

 Strecker, Baylor Univ. Bulletin, Vol. XII, No. i, 1909, p. 13; 

 Stone, Proc. Acad. Nat. Sci. Phila., 191 1, p. 229; Bryant, Univ. 

 Cal. Pubis. Zool., Vol. 9, No. i, 191 1, p. 5; Van Denburgh & 

 Slevin, Proc. Cal. Acad. Sci., Ser. 4, Vol. 3, 1913, p. 393; Strecker, 

 Baylor Bulletin, Vol. XVIII, No. 4, 1915, p. 23; Stejnecer & 

 Barbour, Check List N. Amer. Amph. Rept., 1917, p. 59; Weese, 

 Biol. Bull. Woods Hole, Vol. 32, 1917, p. 98. 



Doliosaurus modestus Girard, U. S. Explor. Exped., Herpetology, 1858, 

 p. 409; Baird, U. S. Mex. Bound. Surv., Vol. II, 1859, p. 10; Baird, 

 Rep. Pac. R. R. Surv., Vol. X, 1859, p. 38. 



Anota modesla Cope, Amer. Naturalist, Vol. XXX, 1896, p. 1014; Cope, 

 Report U. S. Nat. Mus. for 1898, 1900, p. 437, fig. 78 (part); Stone 

 & Rehn, Proc. Acad. Nat. Sci. Phila., 1903, p. 32; Ruthven, Bull. 

 Amer. Mus. Nat. Hist., Vol. XXIII, 1907, p. 550; Ellis & Hender- 

 son, Univ. Colorado Studies, Vol. X, No. 2, 1913, p. 75. 



Phrynosoma platyrhynus Herrick, Terry & Herrick, Bull. Sci. Labor. ' 

 Denison Univ., Vol. XI, 1899, p. 136; Herrick, Terry & Herrick, 

 Bull. Univ. New Mex., Vol. I, 1899, p. 136, pi. XX, fig. 18. 



Description. — Nostrils opening well above lines joining 

 superciliary ridges with end of snout. Head spines of mod- 

 crate size or rather short; about three to five temporals, one 

 occipital, and one small postorbital, on each side. Two or 

 three large conical scales in front of occipital horns. Scales 

 on head slightly convex or flat, roughened with small ridges 

 and granulations. Gular region covered with small gran- 

 ular scales, smaller in posterior than in anterior zone, other- 

 wise subequal without enlarged series. Below lower labials, 

 and in contact with them throughout, is a series of large 

 spinose sublabials which increase in size posteriorly. Two 

 groups of small spines on each side of neck. Back, tail, 

 and upper surfaces of limbs bearing scattered, slightly ele- 

 vated, keeled, tubercular scales, with small scales and gran- 



