CLASS REPTILIA. 



Grey, dotted with brownish scales, nearly square, edged with 

 small grains. North Africa. Mus. Brit. 



White throated Ouran. Mon. P. Alhogularis. Tup. Albo- 

 gularis, Daud. iij. t. 32. 



Head, and neck, beneath, and sides, whitish, brown, dotted 

 with two white lines, from the eye to the nape. Inhab. 



N.B. The Dragon figured by Klein Tent Herpet, t. 

 is an animal of this genus which has had the head united to 

 the skin of the body, just behind the fore legs, so that it 

 appears only to have two legs. 



Gen. II. HoLODERMA. Wiedeman. 



Tongue contractile ? Head broad, depressed, covered with 

 crowded, irregular, many sided, convex, tubercular shields. 

 Palate not toothed; body squamulose with parallel trans- 

 verse ridges of larger distant tuberiform long scales ; 

 abdominal scales, four sides, smooth ; femoral pores none ; 

 tail round. 



Horrid Monoxillo. Holoderma Horridum. Wied. Tachy- 

 dermun Horridum, Wagler, II. t. 18. 



Brown, yellow spotted, tail with close yellow rings. New 

 Spain. 



Gen. III. Teius. 



Tongue contractile, head shielded, palate mostly toothed. 

 Femoral pores distinct. Found only in America. 



I. Abdominal scales square, as long as broad, smooth ; dorsal 

 scales keeled. Tail compressed, keeled. Crocodilurus, 

 Spix. Ada Gray. 



Great Dragon, Lacepede. Common Ada, Teius (A.) 

 Crocodilus, Merrem. Lacep. t. 9. Daud. t. 28. 



Back with scattered keeled scales. Guiane. 

 28 



