368 3. IGUANIDJE 



eee. Usually more than three spinose temporals on 

 each side 5 posterior temporal horn shorter than 

 occipital horn; usually more than the three pos- 

 terior enlarged sublabials spinose. 



P. platyrhinos. p. 421. 



eee 1 . 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. 40 9. 



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 

 0833), p. 105, pi. X (type locality, "In ora occidental! Americse 

 Borealis ad ripas fluminis Columbia); 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. Generate, 

 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; FITZINGER, 



