LIZARDS. 219 



fff Eyehrow-disks covered like the crown with keeled scales. 



Pristinotus. 



The Shoulder-spotted Roquet. Leiocephalus oraatus. 



Olive, yellow-varied, back witli black cross bands and a large 

 black spot in front of each shoulder; crest of the back and tail 

 high, compressed, equal ; tail compressed ; head-shields small, 

 unequal, keeled ; eyebrows covered with 1 or 2 keeled scales like 

 the head ; interparietal plate small ; scales of the back broad, 

 short, rhombic, dagger-pointed. 



a. In spirits. Guayaquil, Trop. America. 



36. Stenocercus, Dum. et Bib. 



Head depressed, triangular, elongate, covered with small equal 

 scales, a distinct interparietal plate, and many longitudinal rows 

 of supraocular shields. Palate toothed. Nostrils rather lateral, 

 directed backwards. Throat without any cross plait. Neck with 

 a longitudinal fold on each side, and a curWlinear fold before each 

 shoulder. Body rather elongate, rather 3-sided, with a very small 

 toothed crest. Scales imbricate, of the back keeled, placed in 

 oblique lines, of the belly smooth. Tail long, compressed, with 

 whorls of large spinose scales. Femoral pores none. 



The Stenocere. Stenocercus roseiventris, D''Orhigny, Voy. 

 A. M. Rept. t. 4,/. 1 — 3. Dum. et Bib. E. G. iv. 350. 



Edge of the ear not toothed ; dark brown above, rosy beneath. 

 Inhab. Bolivia. Mus. Paris, a single specimen. 



37. Trachycyclus, Dum. et Bib. 



Head pyramidical, quadrangular, flattened, covered with nearly 

 equal plates, interparietal veiy small. Nostril rather lateral. Pa- 

 late not toothe^. Neck with a plait on each side, and a fold in 

 front of each shoulder. Body nearly round. Scales of back mo- 

 derate, imbricate, keeled, in converging lines, of the belly smooth. 

 Nape, back and tail not crested. Tail moderate, subconic, slight- 

 ly depressed at the base, surrounded with whorls of spines. Toes 

 toothed on the sides. Femoral pores none. 



The Trachycyclus. Trachycyclus mannoratus, D^Orbigny, 

 Voy. A. M. Rept. t. 4,/. 4—8. Dum.et Bib. E. G. iv. 356, t. 391, 



Inhab. Brazil, Rio Grande. Mus. Paris, 1 specimen. 



ff Interparietal plate large. Back or tail crested. 



3^. Taraguira. Ecphymotes, Cuvier^ not Fitz. Tropidurus, 

 part, Wied., Wagler, Weigm., Gravenh. Oplurus, part. Gray. 

 Platynotus, Wagler P 



Head triangular, depressed, covered with unequal plates, with 

 a moderate rather large interparietal scale, rather small occipital, 



u2 



