422 3. IGUANID/E 



Phrynosoma platyrhinus BOULENGER, Cat. Lizards Brit. Mus., Vol. II, 



1885, p. 247; MEEK, Field Columbian Mus., Zool. Ser., Vol. VII, 



No. i, 1906, p. 12. 

 Anota caUdiarum COPE, Amer. Naturalist, Vol. XXX, No. 358, Oct. 



1896, p. 333 (type locality, "Death Valley, Cal." not definitely 



known); COPE, Report U. S. Nat. Mus. for 1898, 1900, p. 439, fig. 79. 

 Anota platyrhina COPE, Report U. S. Nat. Mus. for 1898, 1900, p. 443, 



fig. 81. 

 Phrynosoma caUdiarum DITMARS, Reptile Book, 1907, p. 157, pis. XLVI, 



figs. 10, 14, L, fig. 2. 

 Phyrnosoma platyshinus STEPHENS, Trans. San Diego Soc. Nat. Hist., 



Vol. Ill, No. 4, p. 62. 



Description. Nostrils opening above lines joining super- 

 ciliary ridges with end of snout. Head-spines of moderate 

 size or rather short; five to seven temporals, one occipital, 

 and one or two postorbitals, on each side. Three scales in 

 front of occipital horns much larger than other head-shields. 

 Later usually almost flat, except just in front of occipital 

 and temporal spines, but roughened with small ridges and 

 granulations. Gular region covered with small granular 

 scales, either uniform or with one series of larger scales at 

 each side. Below lower labials, and separated from them 

 by one or two rows of small scales, is a series of large spinose 

 plates which increase in size posteriorly. Two groups of 

 weak spines on each side of neck, lower somewhat larger 

 than upper. Back, tail, and upper surfaces of thighs bear- 

 ing scattered, slightly elevated, keeled, tubercular scales, 

 with smaller scales and granules between. A single series 

 of peripheral spines, gradually disappearing posteriorly. 

 Tail edged with a row of small spines. Scales on front of 

 the arm large, pointed and strongly keeled. Those on chest, 

 abdomen, and proximal half of tail smooth. Tympanum 

 usually covered with scales, but sometimes naked. Femoral 

 pores varying from six to 12 on each side, often invading 

 preanal region. Males with enlarged postanal plates. 



