428 3. IGUANID.^ 



86. Phrynosoma m'callii (Hallowell) 



Flat-tailed Horned Toad 



Plate 37 



/inota m'callii Hallowell, Proc. Acad. Nat. Sci. Phila., Vol. VI, 1852 

 p. 182 (type locality, "Great Desert of the Colorado, between 

 Vallicita and Camp Yuma, about 160 miles east of San Diego") ; 



Hallowell, Sitgreaves' Exped. Zufii and Colorado Rivers, 1853, 



p. 127, pi. 10; BocouRT, Miss. Sci. Mex., Rept., 4e livr. 1874, p. 



230. 

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



p. 408; Baird, U. S. Mex. Bound. Surv., Vol. II, Rept., 1859, p. 



9, pi. 28, figs. 4-6; Cooper, Proc. Cal. Acad. Sci., Vol. IV, 1870, 



p. 67. 

 Phrynosoma maccallii Cope, Proc. Acad. Nat. Sci. Phila., 1866, p. 310; 



Cope, Bull. U. S. Nat. Mus., No. i, 1875, p. 49; Coues, Surv. 



W. looth Merid., Vol. V, 1875, p. 593; Gentry, Proc. Acad. Nat. 



Sci. Phila., 1885, pi. 148. 

 Anota maccallii Cope, Report U. S. Nat. Mus. for 1898, 1900, p. 448, 



fig. 82; Bryant, Univ. Cal. Pubis. Zool., Vol. 9, No. i, 191 1, pp. 



5, 54, pl- 7- 



Phrynosoma m'callii Stejneger, N. Amer. Fauna, No. 7, 1893, p. 19c; 

 Van Denburgh, Occas. Papers Cal. Acad. Sci., V, 1897, p. 100; 

 Van Denburgh, Proc. Cal. Acad. Sci., Ser. 4, Vol. 3, 1912, p. 153; 

 Van Denburgh & Slevin, Proc. Cal. Acad. Sci., Ser. 4, Vol. 3, 

 1913, pp. 393, 406; Grinnell & Camp, Univ. Cal. Pubis. Zool., 

 Vol. 17, No. 10, 1917, p. 166; Stejneger & Barbour, Check List 

 N. Amer. Amph. Rept., 1917, p. 59; Van Denburgh & Slevin, 

 Proc. Cal. Acad. Sci., Ser. 4, Vol. XI, 1921, p. 51. 



Anota m'calli Stephens, Trans. San Diego Soc. Nat. Hist., Vol. Ill, 

 No. 4, 1921, p. 62. 



Descriftion. — Snout very short with nostrils opening 

 above continuations of superciliary ridges. Large head- 

 spines: one slender occipital, three to five temporals, and 

 five to seven sublabials, on each side. Sometimes a small 

 interoccipital horn. Scales or upper surface of head slightly 

 convex and nearly smooth, two on occiput being largest. 

 Supralabials small, but projecting, malcing margin of upper 



