352 



S A IT R I A. 



3. RHYTIDODEIKA BIBRONI, Grd. 



SPEC. CHAR. Body subfusiform, moderately slender. Head rather 

 short, obtuse, covered with rather well-developed, convex plates. 

 Supralabials elongated, quadrangular, nearly equal to the labials. 

 Auricular aperture moderate, oval, unidentated. Temporal scales 

 rounded. Dorsal and lateral scales subequal, large; abdominal 

 ones rounded and entire. Posterior aspect of thighs wholly granu- 

 lar. Brownish-grey, with a black longitudinal line along the middle 

 of the back and tail. Two series of black spots on each side, and a 

 small interrupted fascia, of the same color, from the shoulder to the 

 thigh. Limbs maculated with black. Belly of a uniform dirty 

 white. 



SYN. Proctotretus bibronii, BELL, Zool. Voy. Beagle, V, 1843, 6. PI. in, fig. 1. 



Liolaemus bibronii, GRAY, Catal. Lizz. Brit. Mus. 1845, 212. 



Rhytidodeira bibroni, GRD. in Proc. Acad. Nat. Sci. Philad. November, 1857, 198. 



OBSERV. Of this vejy characteristic species, no specimens were 

 obtained by the U. S. Exploring Expedition. 



Loc. Port Desire", Patagonia. 



4. RHYTIDODEIRA WIEGMANNI, Grd. 



SPEC. CHAR. Head rather short ; snout obtuse and rounded. Two 

 series of supralabial plates, smaller than the labials. Auricular 

 aperture moderate, granular in front. Dorsal and lateral scales 

 subequal, moderate ; abdominal ones rounded and entire. Poste- 

 rior aspect of thighs granular, with a patch of scales near the tail. 

 Above greyish, with a fawn band on each side, situated between 

 two series of angular black spots. A black streak, margined with 

 white, along the thigh. 



SYN. Proctotretus wieymannii, DUM. & BIBR. Erpet. gen. IV, 1837, 284. GUICH. 

 in Gay, Hist, de Chile, Zool. II, 1848, 36. DUM. Voy. Venus, Zool. 1855, 295. PI. 

 in, fig. 2. 



Plychodeira wiegmanni, FITZ. Syst. Kept. I, 1843, 73. 



Rhytidodeira wiegmanni, GRD. in Proc. Acad. Nat. Sci. Philad. November, 1857, 198. 



