46 Mr. J. E. Gray on two new species of Reptiles. 



XIV. — Description of two new species of Reptiles from the 

 Collection made during the Voyages of H.M.S. Sulphur. By 

 J. E. Gray, F.R.S. 



My dear Sir, 

 Captain Belcher having presented to the British Museum 

 the reptiles collected during this voyage, I send you the de- 

 scription of the two following new species for insertion in the 

 e Annals; 5 they will be figured, with others not yet examined, 

 in the forthcoming e( Zoology " of his Voyage. 



Yours truly, 

 R. Taylor, Esq. J. E. Gray. 



Chameleonidjb. 



Chameleo rhinoceros. Back and belly with a toothed keel ; occiput 

 low, prismatic, with a central keel ; nose with a large projecting 

 trigonal prominence, with a single smooth keel on its lower, and a 

 toothed keel, separated by a deep groove, on each side of its upper 

 surface. Colour dark, white-spotted (in spirits), with a pale streak 

 along the middle of each side. 



Hab. Madagascar ? 



Iguanid^e. 



Opiums torquatus, Cuv. Regne Anim. ii. 46. 



Var. with three bands on the back ; the one on the back of the 

 neck narrow, the two others across the shoulders broad. 



The young is pale gray, with seven black bands ; the one across 

 the shoulder, which remains in the adult animal, the broadest and 

 darkest ; limbs white- spotted. 



According to Dumeril, there is only a single discoloured species 

 of this genus in the Paris collection. 



Hydride. 



Lapemis loreatus. 



Scales large; of the back smooth, of the sides with a small, and of 

 the belly with a large, tubercular keel. Upper labial shields five on 

 each side, with two smaller hinder ones, the first having a small 

 additional plate on the margin ; loreal shields large, over the second 

 labial shield ; the anterior ocular plate largely triangular. 



Hab. 



This species is nearly allied to Lapemis Hardwickii of my mono- 

 graph of Hydridce (Zool. Misc. part 2. p. 60) ; but it is larger than 

 that species, though having the same number of upper labial shields ; 

 has no loreal plates, and has a smaller, square, anterior ocular shield ; 

 the keels of the lower scales are much smaller. 



Crotalus ? 



The young, just hatched, animal of this genus has a short, blunt 

 tail, rather compressed at the end, with the tip covered by a com- 

 pressed, cup-shaped, horny appendage, rounded at the end, about as 

 long as high, near which is evidently the first joint of the future 

 rattle. 



