1883.] GECKOS OP NEW CALEDONIA. 123 



Greyish-brown above, variegated with darker, and with sinall round 

 white spots ; a dark streak from the tip of the snout to the shoulder, 

 passing through the eye ; above this streak and behind the eye two 

 round white spots ; a round white spot on each of the digits ; lower 

 surfaces dirty white, the belly dotted with brown. 



miUim. 



Total length 65 



Head...'. 8 



Width of head 5 



Body. 28 



Fore limb 8 



Hind limb 11 



Tail 29 



This species is described from two female specimens in the British 

 Museum, collected in New Caledonia by Mr. Brenchley, and hitherto 

 confounded with L. cyclurus, and two others, male and young, the 

 types of the species, communicated to me by M. Bavay. 



4. Rhacodactylus, Fitz. 



Under this name I propose to unite the Geckos which have the 

 digits of the same structure as in the genus Gecko of Gray, but have 

 besides the inner digit furnished with a sheathed claw. Accordingly 

 Correlophus, Guicli., Ceratolophus, Boc, and Chamcdeonurus, Blgr., 

 are referred to Rhacodactylus, Fitz., which was established for 

 Platydactylus leachianus, Cuv., the characters upon which these 

 genera were based not being, in my opinion, of more than subgeneric 

 importance. This opinion, as concerns Chamceleonurus, has already 

 been expressed by Prof. Barboza du Bocage ; but, not having a suf- 

 ficient knowledge of B. leachianus, and giving too great importance 

 to the dermal appendages which characterize that species, I was not 

 at first inclined to accept his view. 



I have convinced myself that the species of this genus have the 

 tail prehensile. As regards P. ciliatus, however, I have still some 

 doubts, the specimens examined by me having that organ mutilated ; 

 but Guichenot's figure induces me to believe that such is also the case 

 in that species. 



The genus Rhacodactylus is confined to New Caledonia. 



I. Dorsal scales uniform. 

 A. Digits half-webbed. 



Rostral separated from the nostril; scales on 

 upper surface of head considerably larger 

 than the granules on the back I. leachianus. 



Rostral separated from the nostril ; upper sur- 

 face of head covered with minute granules 

 not larger than those of the back 2. aubri/anus. 



Rostral entering the nostril ; upper surface of 

 head covered with small granular scales al- 

 most as small as those of the back 3. chahoua. 



