344 REPTILES. SAURIA. 



D. Guianensis, Cuv. Body reddish brown, shaded with green. 4 to 6 

 feet long, of which the tail forms one-half. Inhabits Guiana. 

 Shaw, iii. pi. 67- 



It frequents savannahs and marshy plains. Its flesh is eaten- 



Gen. 6. TKIUS, Merrem. Les Sauvegardes, Cuv. 



With all the scales of the back small and smooth ; a row of in- 

 distinct pores under the thighs ; teeth notched ; tail more or 

 less compressed, carinated or smooth ; scales of the belly 

 longer than broad. 



* Tail carinated. 



T. bicarinat^ls, (Lacerta, Lin.) Body reddish brown, more or less 

 tinged with greenish ; two rows of carinated scales on the back, 

 confluent on the tail, and forming a serrated crest. 2 feet 5 inches 

 long. Inhabits South America. Shaw, iii. 212. 



** Tail smooth, compressed towards the point. 



T. Teguixin, ( Lacerta, Lin.) Body black, spotted with blue above, 

 bluish below ; tail banded with blue and black. Nearly six feet 

 long. Inhabits Brazil Shaw, iii. pi. 73. 

 This species runs rapidly, takes the water when pursued, and dives freely. It 



feeds on insects, reptiles, &c. Its flesh is eaten. 



Gen, 7. AMEIVA, Cuv. Lacerta, Lin. 



Tail entirely cylindrical, covered, as well as the belly, with 

 transverse rows of square scales ; those of the belly broader 

 than long ; scales of the throat small ; head pyramidal. 



A. vulgaris, (L. ameiva, Gmel.) The Common Ameiva. Body 

 grayish-blue above, paler below ; with four longitudinal rows of 

 round whitish spots on each side ; neck transversely plaited be- 

 low. 12 inches long. South America, &c. Shaw, iii. pi. 75. 



A. litterata, Cuv. Body bluish green, variegated above with ob- 

 long black spots and transverse black bands, dotted with white, 

 on each side ; neck transversely plaited below Seba, i. pi. 83. 



A. ccerulocephala, Cuv. Blue-headed Ameiva. Head blue, with 

 a white longitudinal line along the middle of the back ; two yel- 

 low parallel lines on each side ; thighs dotted with white ; tail 

 twice the length of the body. Seba, i. pi. 91, fig. 3. 



A. lemniscata, Cuv. (Lacerta, Gmel.) Striped Ameiva. With 

 nine white longitudinal lines upon the back and sides ; tail long, 

 blue on the upper part ; thighs spotted with white ; dorsal line 

 forked at the head. Inhabits Africa. Shaw, iii. pi. J5. 



Gen. 8. LACERTA, Cuv. 



Palate armed with two rows of teeth ; a collar on the under side 

 of the neck formed by a transverse row of large scales, sepa- 

 rated from those of the belly by very small ones ; bone of the 

 .cranium projected on the temples and orbits. 



