248 IGUANIDiE. 



10. Phr3niosonia modestum, 



PhiTnosoma modestum, Girard, in Sfansh. Exped. Gr. Scdt Lake, 



p." 301, pi. Ti. figs. 4-8; Bocovrt, Miss. Sc Alex., Bept. p. 232. 

 Doliosaurus modestus, Girard, U.S. Ex2)lor. ExjKd., Herp. p. 409. 



Nostrils withiu 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 ; gnlar scales uniform, smooth, exceedingly small. Enlarged 

 dorsal scales very small and flat ; no lateral series of spines ; vcntrals 

 smooth, larger than in any other species. Series of femoral pores 

 meeting on the praeanal 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 1 . Phrynosoma braconnieri. 



Phrynosoma braconnieri, Bocourt, 3Iiss. Sc. Mex., Bept. p. 233, 



pi. 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 scries 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 ; 

 gnlar 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 praeanal 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. milUm. 



Total length 48 Fore limb 21 



Head 11 Hind limb 27 



Width of head .... 13 Tail 8 



Body 29 



Mexico. 



a. Hgr. (5 . OaxacR. 



