116 3. IGUANIDJE 



Base of fifth to end of 



fourth toe 28 31 34 31 32 36 



Distribution. Angel de la Guardia Island, Gulf of 

 California, Mexico. 



Remarks. This species differs from C. c. baileyi chiefly 

 in the longer snout, narrower head and single, incomplete 

 black collar. 



18. Crotaphytus wislizenii Baird & Girard 



LEOPARD LIZARD 



Plate 8 



CrotapAyfus tvislizenii BAIRD & GIRARD, Proc. Acad. Nat. Sci. Phila., 

 Vol. VI, 1852, p. 69 (type locality, Santa Fe, New Mexico); 

 BAIRD & GIRARD, Stansbury's Exped. Great Salt Lake, 1853, p. 340, 

 pi. Ill; HAI.LOWELL, Sitgreaves' Exped. Zuni & Colorado Rivers, 

 1853, p. 145; BAIRD & GIRARD, Marcy's Explor. Red River, 1854, 

 p. 205 ; BAIRD, U. S. Mex. Bound. Surv., Vol. II, 1859, p. 7, pi. 31 ; 

 BAIRD, Rept. Pac. R. R. Surv., Vol. X, 1859, p. 17; BAIRD, Rept. 

 Pac. R. R. Surv., Vol. X, Pt. VI, No. 4, 1859, p. 37; COOPER, Rept. 

 Pac. R. R. Surv., Vol. XII, 1860, p. 294; COOPER & SUCKLEY, Nat. 

 Hist. Wash. Terr., 1860, p. 294; COPE, Proc. Acad. Nat. Sci. Phila., 

 1866, p. 303, BOCOURT, Miss. Sci. Mex., Rep., 1874, p. 155, pi. 

 XVII bis. figs. 4, 4a; COPE, Bull. U. S. Nat. Mus., No. 1, 1875; 

 p. 48; YARROW, Surv. W. 100th Merid., Vol. V, 1875, p. 566; 

 COUES, Surv. W. 100th Merid., Vol. V, 1875, p. 590; YARROW & 

 HENSHAW, Ann. Rep. Chief of Engineers for 1878, Surv. W. 100th 

 Merid., Appendix NN, 1878, p. 221; COPE, Proc. Acad. Nat. Sci. 

 Phila., 1883, pp. 14, 15, 18; YARROW, Bull. U. S. Nat. Mus., No. 

 24, 1883, pp. 9, 53 (part); BOULENGER, Cat. Lizards Brit. Mus., 



