12. SCELOPORUS 359 



73. Sceloporus clarkii Baird & Girard 



ARIZONA SCALY LIZARD 



Plate 29 



Sceloporus clarkii BAIRD & GIRARD, Proc. Acad. Nat. Sci. Phila., Vol. 

 VI, 1852, p. 127 (type locality, Sonora); BAIRD, U. S. Mex. Bound. 

 Surv., Vol. II, 1859, p. 5 (part); COPE, Proc. Acad. Nat. Sci. Phila., 

 1866, p. 310; CRAGIN, Bull. Washburn Laborat., Vol.1, 1884, p. 7; 

 STEJNEGER, N. Amer. Fauna, No. 7, 1893, PP- 178-180, pi. i, figs. 

 la-ic; COPE, Amer. Naturalist, Vol. XXX, 1896, p. 1014 (part); 

 VAN DENBURGH, Proc. Cal. Acad. Sci., Ser. 2, Vol. 6, 1896, p. 340; 

 HERRICK, TERRY & HERRICK, Bull. Sci. Lab. Denison Univ., Vol. 

 XI, 1899, p. 126; HERRICK, TERRY & HERRICK, Bull. Univ. New 

 Mexico, Vol. I, 1899, p. 126; COPE, Report U. S. Nat. Mus. for 

 1898, 1900, p. 358, fig. 54 (part); STEJNEGER, Proc. U. S. Nat. 

 Mus., Vol. 25, 1902, p. 150; STONE, Proc. Acad. Nat. Sci. Phila., 

 I 93> P- 3i; BAILEY, N. Amer. Fauna, No. 25, 1905, p. 42; MEEK, 

 Field Columbian Mus. Nat. Hist., Zool. Sen, Vol. VII, No. i, 1896, 

 p. ii; DITMARS, Reptile Book, 1907, p. 128 (part); RUTHVEN, Bull. 

 Amer. Mus. Nat. Hist., Vol. XXIII, 1907, p. 537; STONE, Proc. 

 Acad. Nat. Sci. Phila., 1911, p. 227; VAN DENBURGH & SLEVIN, 

 Proc. Cal. Acad. Sci., Ser. 2, Vol. 3, 1913, pp. 392, 404. 



Sceloporus clarkii clarkii COPE, Bull. U. S. Nat. Mus., No. i, 1875, p. 

 40 (part); YARROW, Surv. W. icoth Merid., Vol. V, 1875, P- 575> 

 pi. XXIII, figs, i, i a (part). 



Sceloporus clarki clarki COUES, Surv. W. icoth Merid., Vol. V, 1875, 

 p. 594, pi. XXIII, figs, i, la (part); YARROW, Bull. U. S. Nat. 

 Mus., No. 24, 1883, PP- IJ > 63 (part). 



Sceloporus spinosus clarkii BOULENGER, Cat. Lizards Brit. Mus., Vol. 

 II, 1885, P- 227 (part); BOULENGER, Proc. Zool. Soc. London, 

 1897, p. 496; STRECKER, Baylor Univ. Bulletin, Vol. XII, No. i, 

 1909, p. 13; STRECKER, Baylor Univ. Bulletin, Vol. XVIII, No. 4, 

 1915, p. 20. 



Sceloporus spinosus GUNTHER Biologia Centrali-Americana, Reptiles, 

 1890, p. 63 (part). 



Description. Head and body depressed. Nostril open- 

 ing nearer to end of snout than to orbit. Upper head- 

 plates smooth and usually a little convex. Frontal divided 

 trans venely. Parietal and frontoparietal plates not separated 



