5. SAUROMALUS 99 



Distribution. Monserrate, Carmen and Coronado 

 islands, in the Gulf of California, Mexico. 



Type. Adult male, No. 50503, Mus. Calif- Acad. Sci.; 

 Joseph R. Slevin, collector, May 25, 1921. 



Type locality. South end of Monserrate Island, Gulf 

 of California, Mexico. 



14. Sauromalus hispidus Stejneger 



SPINY CHUCKWALLA 



Plates 5 and 6 



Sauromalus ater STREETS, Bull. U. S. Nat. Mus., No. 7, p. 36; TOWN- 

 SEND, Proc. U. S. Nat. Mus., Vol. XIII, 1890, p. 144. 



Sauromalus hispdus STEJNEGER, Proc. U. S. Nat. Mus., Vol. XIV, 1891, 

 p. 409 (type locality, Angel de la Guardia Island, Gulf of 

 California); STEJNEGER, N. Amer. Fauna, No. 7, 1893, p. 174; 

 VAN DENBURGH, Proc. Cal. Acad. Sci., Ser. 2, Vol. 5, 1895, p. 99; 

 COPE, Report U. S. Nat. Mus. for 1898, 1900, p. 266, fig. 23; 

 VAN DENBURGH & SLEVIN, Proc. Cal. Acad. Sci., Ser. 4, Vol. 4, 

 1914, pp. 132, 146; TOWNSEND, Bull. Amer. Mus. Nat. Hist., 

 Vol. XXXV, 1916, p. 426; STEJNEGER & BARBOUR, Check List N. 

 Amer. Amph. Kept., 1917, p. 46; NELSON, Mem. Nat. Acad. Sci., 

 Vol. XVI, pp. 84, 114, 126. 



Description. Head and body very large, much de- 

 pressed, the latter very broad. Head almost triangular, 

 with narrow rounded snout, and covered with small plates 

 largest on frontal and temporal regions. Nostrils opening 

 upward, outward, or slightly backward, in round plates a 

 little nearer to end of snout than to orbits. Superciliaries 

 like supraoculars, small and juxtaposed. Suboculars all 

 short, but keeled. Rostral plate very small. Labial plates 

 small and of about equal size. Symphyseal plate long but 

 very narrow. Several series of slightly enlarged sublabials 

 passing gradually into the finely granular gulars. Gular 



