248 IGUANIDE, 
10. Phrynosoma modestum. 
Phrynosoma modestum, Girard, in Stansb. Exped. Gr. Salt Lake, 
p. 861, pl. vi. figs. 4-8; Bocourt, Miss. Se Mex., Rept. p. 282. 
Doliosaurus modestus, Girard, U.S. Explor. Exped., Herp. p. 409. 
Nostrils within the canthi rostrales; tympanum naked ; head- 
spines of moderate development, five on each side, viz. a very small 
postorbital, three temporals, and an occipital; latter not larger than 
the largest temporal, A series of very large scales below the lower 
labials ; gular scales uniform, smooth, exceedingly small. Enlarged 
dorsal scales very small and flat ; no lateral series of spines ; ventrals 
smooth, larger than in any other species. Series of femoral pores 
meeting on the preanal region. Tail about twice and a half as long 
as head and body, tapering very suddenly, perfectly cylindrical 
beyond the dilated portion of its base. Uniform yellowish brown 
above, with a patch of black on each side of the nape. 
Total length 75 millim. 
Texas to Oregon and California. 
1]. Phrynosoma braconnieri. 
Phrynosoma braconnieri, Bocourt, Miss. Sc. Mex., Rept. p. 233, 
pl. xii. fig. 7. 
Head broader than long; nostrils pierced within the canthi 
rostrales; tympanum naked; head-spines small, six on each side, 
viz. a supraorbital, four temporals, and an occipital; latter a little 
larger than the others. A series of enlarged scales, a little larger 
than and parallel with the lower labials; gular scales equal [or with 
a longitudinal series of slightly enlarged scales on each side], keeled ; 
gular fold strong, forming a deep pouch on each side of the neck; 
a dermal thickening, with two series of spinose scales, on each side 
between the gular fold and-the tympanum. Back and limbs with 
scattered large spinose keeled scales which, on the back, are about 
as broad as long; a lateral series of spines; pectoral and ventral 
scales keeled. Twelve or thirteen femoral pores on each side, not 
extending on the preanal region. Male with enlarged postanal 
scales. ‘Tail shorter than the head, as long as broad at the base. 
Sandy-coloured above, tinged with red on the head and limbs; a 
large blackish spot on each side of the nape; belly spotted with 
blackish. 
millim. millim. 
Total length ...... 48 Fore limb ........ 21 
PRGA oie oils each 1] Hind limb........ 27 
Width of head .... 13 Haas) tga toncias a a cas 8 
Body. sce uisienics a5 gs 29 
Mexico. 
a, Agr. dg. Oaxaca, 
