50. PHRYNOSOMA. 249 
12. Phrynosoma taurus. 
Phrynosoma taurus (Duges), Bocourt, Miss. Sc. Mex., Rept. p. 254, 
pl. xii. fig. 8. 
Head broader than long, with the temporal region much produced, 
the posterior outline of the head forming a strong concave curve ; 
nostrils within the canthi rostrales ; tympanum naked; the temporal 
processes covered with strongly enlarged scales, terminating in a 
long spine with a smaller detached one on the inner side; on cach 
side a small occipital spine and a postorbital of equal size. A series 
of large scales below the lower labials; gular scales subequal, 
keeled, with a more or less distinct longitudinal series of slightly 
enlarged pointed scales on each side; gular folds several, forming a 
pouch on each side of the neck; a dermal appendage, bearing large 
spinose scales, on each side between the gular fold and the head. 
Back and limbs with scattered large spinose keeled scales; on the 
back they are as broad as long, or a little longer than broad; a 
lateral series of spines ; pectoral and ventral scales keeled. Eight 
to eleven femoral pores on each side, not extending on the preanal 
region. Male with enlarged postanal scales. Tail as long as or 
shorter than the head. Greyish or yellowish above, with transverse 
series of large blackish spots; a large black patch on each side of 
the nape; lower surfaces more or less distinctly spotted with 
blackish. 
millim. millim 
Total length ...... 86 Fore limb ........ 40 
Head jrcax ae cacxe 16 Hind limb........ 54 
Width of head .... 21 Tail: cca eave es 10 
Body sevice we goteiatscs 60 
Mexico. 
af. 3,9,& yg. Foot of Popocatepetl, M. Boucard [C.]. 
Puebla. 
The following Lizard, type of the genus Pneustes, described by 
F. d’Azara, Quadr. Paraguay, ii. p. 325, has not been rediscovered 
in the course of the present century :— 
Pyevstes, Merrem. Tent. p. 49. 
“Palme tetradactyle ; Plante pentadactyle; Aures latentes ; 
Gula dilatabilis.” 
Pneustes prehensilis. 
Agama prehensilis, Daud. Rept. iii. p. 440. 
Pneustes prehensilis, Merr. 0. ¢. 
Paraguay. 
