TAPAYA HERNANDESI. 395 



series of black spots or blotches, posteriorly light-margined. Beneath 

 yellowish, maculated with jet-black. 



SYN. Tapaya orbicularis, Cov. Regn. Anim. II, 1817, 35; 2d ed. II, 1829, 37; &, 

 ed. illustr. Kept. 53. 



P/iri/nosoma orbiculare, WiEGM. in Oken, Isis, XXI, 1828, 367 ; &, Herp. Mex. 

 I, 1834, 53. Tab. vm, fig. 1. WAUL. Descr. & Icon. Amph. 1828. Tab. xxui, figs. 

 1 & 2 ; &, Naturl. Sjst. Amph. 1830, 146. SCHINZ, Naturg. u. Abbild. Kept. 1833, 

 88. Tab. xxvii. fig. 2. DOM. & BIBR. Erpet. gen. IV, 1837, 321. GRAY, Synops. 

 Kept, in Griff. Anim. Kingd. IX, 1831, 45; &, Catal. Lizz. Brit. Mas. 1845, 228. 

 GRD. in Stand. Expl. Vail. Gr. Salt Lake, Utah, 1852, 359. 



Aijama orbicularis, DA'UD. Hist. nat. Rspt. Ill, 1805, 406. VOIGT, Uebers. Thierr. 

 Cuv. II, 1831, 54. 



Phri/nosoma orlirularis, GRAVENH. in Nov. Act. Acad. nat. cur. XVI, n, 1834, 911. 

 Tab. LXIII. 



Phrynosoma wiegmanni, GRAY, in Beechey, Voy. to the Pacif. Zool. 1839, 96. 



Tup'iyaxin, Lacertus orbicularis, HERNAND. Nov. Plant. Anim. Min. Mex. Hist. 

 1648, 67. 



The Tapayaxin of Mexico, GRIFF. Anim. Kingd. IX, 1831, 124. 



OBSERV. Characterized by its small head and cephalic spines, 

 which are larger than in any other species of the same genus. 



Loc. Valley of Mexico. 



2. TAPAYA HERNANDESI, Grd. 



SPEC. CHAR. Head rather large, depressed ; vertex broad, slightly 

 inclined anteriorly; snout protruding. Cephalic plates small. 

 Occipital and temporal spines small and conical. Submaxillar 

 shields moderate. Auricular apertures simple, granular. Mental 

 scales very small : the series adjoining the submaxillar shields 

 larger than the rest. Several folds under the throat, minutely 

 granular. Abdominal scales small and subrhomboid, acuminated. 

 Femoral pores small, not continuous across the interfemoral region. 

 Blackish-brown above, with a double or quadruple series of black, 

 light-margined spots. Beneath yellowish, unicolor, else obscurely 

 maculated. 



OBSERV. Allied to the preceding species, from which it chiefly 



