REPTILIA. 331 



species, and perhaps the only island where it occurs. It would certainly be 

 natural to expect this species upon Grenada, and perhaps its absence there may 

 be laid to the account of the mongoose, as may also be the case with other species 

 which might be expected upon this island. 



Herpetodryas carinatus (Linne). 

 Linne, Syst. nat., ed. 10, 1758, 1, p. 22.3. Boulenger, Cat. snakes Brit, mus., 1894, 2, p. 73. 



This mainland species has been recorded from the island of Guadeloupe, 

 and Boulenger says that he has compared this specimen from Guadeloupe in the 

 British museum with mainland examples, and can find no difference between 

 them. It does not appear to be recorded from others of the Antilles, and may 

 possibly have been brought to Guadeloupe as a rat exterminator. It would be 

 expected to occur upon other islands if its distribution had not been by artificial 

 agency. Of course it is not improbable that the locality may not be correct. 



Herpetodryas vincenti Boulenger. 

 Boulenger, Proc. Zool. soc. London, 1891, p. 355. 



This species, which was originally described as a variety, differs in having a 

 greater number of ventrals and subcaudals, and in being more slender than the 

 mainland form. The types, in the British museum, came from St. Vincent. 

 The two specimens in the Museum from this island also show these characters. 



Uromacer catesbyi (Schlegel). 

 Schlegel, Essai phys. Serp., 1837, 2, p. 226. Boulenger, Cat. snakes Brit, mus., 1894, 2, p. 115. 



A rare member of this peculiar genus, which is wholly confined to Haiti. 

 Its habit, which is so strikingly like that of Dryiophis in the Old World and 

 Oxybelis in the New, is a marvellous adaptation to arboreal life, since this snake 

 is hardly more related to either of these genera than they are to each other. 

 The Museum has several specimens, including three which Mr. W. M. Mann 

 caught at Momance, Haiti. 



Uromacer frenatus (Gunther). 



Gunther, Ann. mag. nat. hist., 1865, ser. 3, 5, p. 116. Boulenger, Cat. snakes Brit, mus., 1894, 2, 

 p. 116. 



Another species confined to Haiti. I had some difficulty in locating the 

 types of Garman's Uromacer inornatus, which Boulenger rightly placed in the 

 synonymy of this species. Finally, however, I found four examples which 

 agreed exactly with Garman's description as to scale counts, so that there can 



