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368 3. IGUANID& 



eee. — Usually more than three spinose temporals on 

 each side; posterior temporal horn shorter than 

 occipital horn; usually more than the three pos- 

 terior enlarged sublabials spinose. 



P. platyrhinos. — p. 42 1 . 

 eee'. — Only three spinose temporals on each side; 

 posterior temporal horn of same size as occipital 

 horn; only three posterior enlarged sublabials 

 spinose. Sonora. 



P. goodei. — p. 426. 

 ddd/ — Peripheral fringe of two or three series of 

 elongate spines, 

 eeee. — Ear-opening exposed; tail not broad and flat- 

 tened; lateral fringe of two rows; a light median 

 dorsal line, but no dark one. 



P. cornutum. — p. 409. 

 eeee'. — Ear hidden under skin; tail broad and flat- 

 tened; lateral fringe of three (or two) rows; a 

 a narrow dark median dorsal line. 



P. m'callii.— p. 428. 

 ccc\ — No periphero-abdominal fringe of elongate scales; 

 tail conical; ear hidden under skin. 



P. modestum. — p. 430. 



74. Phrynosoma douglassii douglassii (Bell) 

 Pigmy Horned Toad 



Agama douglassii Bell, Trans. Linn. Soc. London, Vol. XVI, 1828 

 (1833), p. 105, pi. X (type locality, "In ora occidental! Americae 

 Borealis ad ripas fluminis Columbiae); Harlan, Medical and 

 Physical Researches, 1835, p. 141, fig. 3. 



Phrynosoma douglassii Wagler, Natural. Syst. Amph., 1830, p. 146; 

 Gray, Griffith's Anim. Kingd., Vol. IX, 1831, p. 44; Wiegmann, 

 Herpet. Mexic, 1834, p. 54; Dumeril & Bibron, Erpet. Generale, 

 Vol. IV, 1837, p. 323; Holbrook, N. Amer. Herpetology, Ed. I, 

 Vol. Ill, 1838, p. 69, pi. XII, and Ed. 2, Vol. II, 1842, p. 101, pi. 

 XIV; Dekay, Zool. New York, Vol. Ill, 1842, p. 31; Fitzincer, 



