1856.] 147 



by Mr. Gray. They may be new species, or ouly varieties of those already de- 

 termined. Future and more extended observation will settle this point. 



ChamjELeo granulosus, nob. 



This Chameleon is much larger than any of the specimens we have of dilepis 

 or of gracilis from W. Afriea, resembling somewhat in size the Ch. pardalis of 

 Madagascar, but it is not so stout. 



Char. Outline of head above oval, somewhat narrower in front than poste- 

 riorly ; lateral crests not meeting in front ; central keel very low, hardly percep- 

 tible ; spaces on each side, between it and the lateral crest, depressed, slightly 

 rounded, occupied with polygonal tubercles of unequal size ; supraciliary ridge 

 high, subcircular ; back and upper part of tail denticulated, the denticulations 

 larger near the neck, having there the form of a crest ; a crest upon chin, throat 

 and abdomen, none under the tail. Scales upon sides unequal, tubercular ; foiir 

 or five rows of flat quadrangular scales between the dorsal denticulations and 

 the lateral tubercles. 



Description. The outline of the head above resembles that of Chamreleo sene- 

 galensis, but is less narrow in front ; the supraciliary crest is also much more 

 elevated ; it differs from gracilis in having a trace only of the bifurcations of 

 the central keel, and in being covered with tubercles and smooth polygonal 

 scales ; the scales, both upon the head and sides of the body, are larger and 

 more tubercular than in Senegalensis, the general shape of the head is different, 

 and the present species is considerably larger. It may, however, be only a 

 variety of Senegalensis, or perhaps the male. Color greyish, with a tinge of 

 blue upon the abdomen. 



Dimensions. Length of head I inch T lines ; breadth above, between the supra- 

 ciliary crests, 7 lines ; length of neck and body to vent 4 inches ; of tail 5 inches ; 

 total length 10 inches 1 lines. 



Habitat. West Africa. One specimen presented by Mr. Cassin. 



Oham^leo Burchelli. 



Char. Rather larger than C. dilepis. Outline of head above resembling some- 

 what that of Charateleo pardalis, but less narrow, prolonged, with lateral crests 

 much more depressed and the interspace more shallow ; central keel very low, 

 interspace between it and lateral crests occupied with flattened polygonal scales 

 of unequal size; supraciliary ridge low, the lateral crests not in contact anteri- 

 orly ; scales upon the sides of the head rather large, flattened, with a slight ele- 

 vation in the centre, polygonal ; back denticulated, more slightly posteriorly ; a 

 few spines upon neck ; throat and abdomen denticulated ; scales of body unequal, 

 tubercular, general shape subrhomboidal, interspersed with very small granules. 



Color. In specimen examined greenish, with a lateral yellow stripe. 



Dimensions. Length of head 1 inch 5 lines ; breadth between supraciliary 

 ridges 6 lines ; length of neck and body to vent 3 inches *7 lines ; length of tail 4 

 inches 9 lines ; total length 9 inches 9 lines. 



Habitat. Fernando Po. One specimen presented by Dr. Burtt, U. S. N. 



GECKOTID^. 



LIZARDS Geckotiens, ou Sauriens Ascalabotes, D. & B. 



The family Geckotidae are divided by Dumeril and Bibron into seven genera 

 l,Platydactylus ; 2, Hemidactylus ; 3, Ptyodactylus ; 4, Phyllodactylus ; 5, Sphse- 

 riodactylus ; 6, Gymnodactylus ; 7, Stenodactylus. The Geckotians described 

 in this paper belong to the genera Hemidactylus and Gymnodactylus, the for- 

 mer thus characterized : 



Hemidactylus, Cuvier, Gray, Wagler, Weigmann. 

 Char. Base of the four or five fingers of each extremity enlarged into a disk. 



