1. TUPINAStBIS. 335 



Teguixin, Gray, Griff. A. K. ix., Syn. p. 29. 



Teius, Gray., Ann. N. H. i. 1838, p. 276, and Cat. Liz, p. 16. 



Salvator, Diim. i§- Bibr. v. p. 78. 



Tongue long, of nearly equal width throughout, sheathed at the 

 base. Lateral teeth longitudinally compressed and tricuspid in the 

 young, the crowns obtuse iu the adult. Head with large regular 

 shields ; anterior nasal in contact with its fellow ; nostril pierced 

 in the suture between the two nasals. Eyelids developed. Ear 

 exposed. Limbs well developed ; digits five. Dorsal scales small, 

 juxtaposed, equal ; ventral plates small, elongate-quadrangular, 

 smooth, forming regular series. A double collar-fold. Eemoral 

 pores. Tail rounded. 



South America. 



Synopsis of the Species. 



Two loreal plates ; dorsal scales oval, 

 convex ; 46 to 50 ventral scales across 

 the middle of the belly 1. rufescens, p. 335. 



Two loreal plates ; dorsal scales oval, flat ; 

 36 to 40 ventral scales across the mid- 

 dle of the belly 2. tegui.vin, p. 335, 



One loreal plate ; dorsal scales regularly 

 hexagonal, flat ; about 30 ventral scales 

 across the middle of the belly 3. nigropunctatus, p. 337. 



1. Tupinambis rufescens. 



Tejus rufescens, Gilnth. Proc. Zool. Soo. 1871, p. 541, and Trans. Zool. 

 Sac. xi. p. 221, pi. xlv. 



Very similar to T. teguixin, but with all the scales considerably 

 smaller, this being most eonspiciious on the temporal, dorsal, and 

 gular regions ; the granules of the back more convex ; a double 

 series of enlarged scales above the temple. A single anterior un- 

 divided chin-shield. Ventral scales in thirty-two to thirty-four 

 transverse and forty-six to fifty longitudinal series. Seven or eight 

 femoral pores on each side. Posterior part of the tail scarcely com- 

 pressed. Reddish yellow, above Avith blackish-brown transverse 

 bands; lower parts with more or less indistinct irregular transverse 

 dark spots. 



From snont to vent 40 centim. ; tail 60 centim, 



Mendoza. 



a,b. c? . Mendoza. Zoological Society. (Tvpes.) 



2. Tupinambis te^iixin. 



Toius leguoxim, Gray, Cat. p. 16. 

 Lacerta teguixin, Linn. S. N. i. p. '.M'lS; Shaw, Zool. iii. p. 235, 

 pis. Ixxiii., Ixxiv. ; Ihivern. R. A., Jtept. pi. xi. fig. 1. 



