LIZARDS. 199 



e. Adult, in spirits. The crest of the back low, in some places 



in-egularly, as if formed of 2 series of scales. 

 /. Young, in spirits. Olive, throat black-lined, crest low over the 



nape, indistinct on the back, back with a central series of 8 



round white spots. Jamaica. Presented by Robert Heward, 



Esq. 



D. maculata, Gray^ B. M. 



Varies in the size of the chin-shields, the height of the crest, 

 in the number and size of the lines of scales at the back of the 

 vent, and of the disk of the scales over the eyebrows. 



25. Rhinosaueus. 



The penultimate joint of the toes dilated. Back and nape 

 with a low crest formed of 2 diverging series of short triangular 

 scales. Ventral scales flat, imbricate. Head elongate. Upper 

 jaw produced beyond the lower, acute in front. Rostral plate tri- 

 angular, horizontal, inferior. 



The Sharp-nosed Anolis. Rhiuosaurus gracilis. Anolis 

 gracilis, Niemv. Abbild. t. f. 2. A. nasicus, Dum. et Bib. E. 

 G. iv. 115. 



Head elongated; muzzle pointed, swollen, compressed, slightly 

 arched and produced beyond the lower jaw, with a rhomboidal 

 anterior frontal pit ; scales of the head oblong, convex in the cen- 

 tre, of the back granular, very small, oblong, smooth, of the belly 

 ovate, smooth, imbricate ; throat-pouch very large, yellow ; nape 

 and back with a dorsal fold ; tail very long and slender, without 

 any keel, strong and triangular at the base, slightly compressed at 

 the end. 



a. Stuffed. Blackish grey. Bahia. Presented by Kerr, Esq. 



26. Anolius, part, Cuv. Anolis, Merrem. 



The penultimate joint of the toes dilated. Back and nape 

 simple, or with a low crest formed of 2 diverging series of short 

 triangular scales. Ventral scales flat, imbricate. Head moderate. 

 Upper jaw even with the lower, rounded at the end. The rostral 

 plate erect. 



On leaves of trees, jumping from branch to branch. 



The species are very difficult to be distinguished from each 

 other in spirits. The toes appear to vary in width and length in 

 the same species ; it may be a sexual distinction. 



