50. PHRYNOSOMA. 249 



12. Phrynosoma taurus. 



Phryuosoma taurus (Duf/cs), Bocourt, Miss. Sc. 3Ie.v., Repi. p. 234, 

 pi. 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 rostralcs ; 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 each 

 side a small occipital spine and a postorbital of equal size. A series 

 of large scales below the lower labials ; gular scales subcqual, 

 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 aud limbs with scattered large sj)inose 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 pra3anal 

 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. 



milHra. millim. 



Total length 86 Fore limb 4U 



Head 16 Hind limb 54 



Width of head .... 21 Tail 10 



Body 60 



Mexico. 



a-f. iS , $, & yg. Foot of Popocatepetl, M. Boucard [C.]. 



Piiebla. 



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 : — 



Pneustes, Merrem. Tent. p. 49. 



" Palmse tetradactylte ; Plantse pentadactyloe ; Aures latentes ; 

 Gula dilatabilis." 



Pneustes prehensilis. 



Agama preliensili.'^, Daud. Rcpt. iii. p. 440. 

 Pueustes prelieusilis, Merr. I. c. 



Paraguay. 



