15. LIOSAURTJS. 16. ItlPLOL^MTJS. 125 



Habit stout, Phrynocephalus-like. Head rather large, slightly 

 longer than broad ; snout short, rounded, with very short and 

 obtuse can thus rostralis ; nostril considerably nearer the end of the 

 snout than the orbit ; ear-oiiening vertically oval, a little smaller 

 than the eye-opening. Upper head-scales small, convex, smooth, 

 largest on the forehead and between the orbits, where they form 

 four longitudinal series in the middle ; occipital scarcely enlarged ; 

 supraocular scales very small, with a group of slightly enlarged 

 ones ; a series of infraorbitals, that immediately under the eye the 

 largest ; labials small, rostral and mental much larger. Dorsal 

 scales very small, equal, granxilar, flat, smooth ; ventrals larger, 

 though also very small, roundish- subquadrangular, subimbricate, 

 smooth. Limbs short ; the adpressed hind limb reaches hardly the 

 ear ; digits slightly depressed, with long falciform claws. Tail 

 tapering gradually, nearly as long as head and body, covered with 

 small, juxtaposed. Hat, smooth scales. Pale greyish above, orna- 

 mented with symmetrical blackish, white-edged spots : a black band 

 on the middle of the snout, bifurcating between the orbits, the 

 branches terminating on the occiput ; a black band on each side of 

 the head, passing through the eye and above the car, and extending 

 to above the axilla ; another black baud from the angle of the 

 mouth ; a series of posteriorly-directed tricuspid black spots on the 

 middle of the back ; three or four series of oval spots along the 

 flanks ; tail with blackish aunuli ; lower surfaces whitish, with 

 interrupted longitudinal blackish lines. 



Total length 133 miUim. 



Head 19 



Width of head 17 



Body 46 „ 



Fore limb 28 



Hind limb 42 



?5 



J? 



Tail 68 



8outh America. 

 a. 2 S. America. T. Bell, Esq. [P.]. 



16. DIPLOL^MUS. 



Diplolsemus, Bell, Zool. Beagle^ Bept. p. 19 ; Gray, Cat. Liz. p. 224. 



Tympanum distinct. Body depressed, covered with small smooth 

 scales; no dorsal crest. Upper head- scales small. A transverse 

 gular fold ; no gidar pouch. Digits cylindrical, with smooth lamellaj 

 inferiorly. No femoral pores. Tail rather short, round. Lateral 

 teeth with obtuse or 8ubs[)heri cal crowns; no teeth on the palate. 

 No sternal foutanelle. Abdominal ribs. 



Patagonia. 



