50. PHRYNOSOMA, 245 
6. Phrynosoma regale. 
Phrynosoma blainvillii, part., Gray, Cat. p. 228, 
Phrynosoma regale, Girard, U.S. Explor. Exped., Herp, p. 406, and 
US. Mer. Bound. Surv., Rept. p. 9, pl. xxviii. figs. 1-3; Bocourt, 
Miss. Sc. Mex., Rept. p. 235, pl. xii. fig. 12. 
Head a little broader than long; nostrils within the canthi 
rostrales; tympanum naked; postorbital spine small; head bor- 
dered posteriorly by a series of contiguous large spines obliquely 
directed upwards, viz. two smaller median and two larger outer 
occipitals and, on each side, four temporals. A series of very large 
projecting scales below the lower labials, almost continuous with the 
temporal spines ; gular scales very feebly keeled, with a longitudinal 
series of enlarged ones on each side ; two groups of spines on each 
side of the neck; a double transverse gular fold. Back with very 
large trihedral tubercles, the largest broader than long; two lateral 
series of spines, lower very small; pectoral and ventral scales very 
feebly keeled. Fourteen or fifteen femoral pores on each side, 
extending only on the proximal third of the thigh, and the two 
series narrowly separated on the preanal region. Male with 
enlarged postanal scales. Tail a little over twice the length of the 
head. Brownish above, with an ill-defined darker band on each 
side of the back ; belly whitish, with a few brownish spots. 
millim. millim 
Total length ...... 188 Fore limb........ 42 
i & Ics: ae eRe ere 20 Hind limb........ 54 
Width of head .. 22 bet re ere eer 46 
Body sci ex cass a4 72 
Desert of Gila and Colorado. 
aod. [ California. ] 
7. Phrynosoma cornutum, 
Phrynosoma cornutum, Gray, Cat. p. 229. 
Agama cornuta, Harlan, Journ, Ac, Philud. iv. 1825, p. 299, pl. xx. 
Phrynosoma bufonium, Wregm. Isis, 1328, p. 367. 
cornutum, Gray, Griff. A. K. ix. Syn. p. 45; Holbr. N-Am. 
Herp. ii. p. 87, pl. xi.; Girard, in Stansb. Exuped. Gr. Salt Lake, 
p- 860, pl. viii. figs. 1-6; Hallow. in _Sitgr. Exped. Zuni & Color. 
Riv. p. 119; Girard, U.S, Explor. Exped., Herp. p. 403, pl. xxi. 
figs. 6-9; Bocourt, Miss. Sc. Mev., Rept. p. 236, pl. xii. fig. 9. 
harlanii, Wiegn. Herp. Mex. p. 54; Dum. & Bibr. iv. p. 314. 
—— (Tropidogaster) cornutum, Litsing. Syst, Rept. p. 79. 
) bufonium, Fitzng. 1. ce. 
== 
Head as long as broad, or a little broader than long; nostrils 
within the canthi rostrales ; tympanum naked; five spines on each 
side of the head, viz. a postorbital, three temporals, and an occipital ; 
a more or less distinct small median occipital; the large occipitals 
much longer than the temporals, obliquely directed upwards and 
