222 [OCTOBER; 



Hemidactylus pr^signis, nob. 



Char. Mental plate large, and triangular ; immediately behind it a transverse 

 row of four plates, the two exterior large, the two middle quite small ; seven to 

 eight plates margin the upper jaw on each side, and as many the lower ; scales 

 upon the abdomen much larger than those upon throat and neck ; in the latter 

 regions granular ; color brownish above, lighter brown or grej'ish beneath. 



Description. The head is long and rather narrow, depressed in front, covered 

 above with granulations larger upon the front ; rostral plate large, somewhat 

 quadrangular in shape ; the nostril, which is more or less circular, situ- 

 ated at its upper and external angle ; of the seven plates which margin 

 the upper jaw the first appears to be the highest; these plates are all very dis- 

 tinct, and more or less quadrangular ; the mental plate is large and triangular, 

 broader than long; there are four plates immediately behind it, the two inter- 

 mediate very small, the two lateral, which are in contact with the first inferior 

 labial, quite large; the eyes are large, the pupil circular; auricular openings 

 moderate ; body moderately st<fut, covered above with granulations of nearly 

 equal size; tail longer than head, neck and body, rather stout at base, covered 

 above and upon the sides with imbricated scales, jsresenting below a longitu- 

 dinal row larger than the others ; chin and throat covered with small granulations 

 of nearly equal size ; the abdomen is covered ivith smooth and qvite large imhricated 

 scales, contrasting strongly with the small granulations upon the chin and throat ; 

 under surface of extremities covered with scales, those of the posterior much 

 larger ; granulations above ; anterior surface of thighs with scales ; the thumbs 

 are deprived of nails, the remaining toes dilated with undivided subdigital 

 laminEe ; no femoral or anal pores. 



Coloration. Uniform brown above, with no lines or spots ; lighter brown or 

 greyish beneath. 



lUmcnsions. Length of head 9 lines ; greatest breadth 6 ; length of neck and 

 body to vent 1 inch 8 lines ; of tail 3^ inches ; of arm 3 lines ; of forearm 3 ; of 

 hands to extremity of longest finger 4 ; of thigh 6 lines ; of leg 4 lines ; of feet 

 to extremity of longest toe 5 J lines. 



Habitat. Jamaica. Two specimens presented by Caspar W. Pennock, Esq., M.D. 



Gen. Remarks. This species differs very much from the only species of Pero- 

 pus heretofore described ; among other particulars in the following ; It has four 

 scales behind the mental instead of six. In Ouallensis there are twenty-four 

 superior labial plates and twenty-six inferior ? and the scales upon the under 

 surface of the animal are not represented as unequal in size. 



Fam. IGUANIDJE. 

 Lezards lauANiENS ou Sauriens Eunotes, Dumeril et Bibron. , 

 NOROPS, Wagler. 



The following are the characters of the genus Norops as given by Dumeril 

 and Bibron, (Erpet. Gen. Tome iv. p. 81.) 



" Skin beneath the neck forming a salient fold ; a sort of small throat pouch 

 without denticulations ; neither palatine teeth nor femoral pores. Fourth toe of 

 the foot longer than the third. Scales of the body carinated, in part imbricate ; 

 those upon the sides much smaller than upon the back and abdomen. Tail 

 moderate, not prehensile, destitute of crest like the back." 



But one species of this genus has been described, viz., Norops auratus, from 

 Surinam and other parts of Guiana. The specimen in our collection, received 

 from the Garcilen of Plants, is from Mexico. The toes are dilated, but not to so 

 great an extent as in many species of Anolis. The present species with the same 

 generic characters, is totally destitute of any such dilatation. 



Norops macrodactylus, nob. 

 Char. Scales upon snout tricarinate ; those of supra-orbitar ridges separated 

 from each otlier hjr a row of smaller scales ; twelve rows of dorsal scales dis- 

 tinctly carinated ; scales upon abdomen carinated ; upon flanks very small ; 



