Dr. J. E. Gray on Notopteris, 307 



Several conchologists, for example the Messrs. Adams, have sup- 

 posed that this shell, on account of the size of the nucleus, ought to 

 be referred to the genus Cymbium, which is characterized by having 

 an irregular callous tip to the nucleus ; but if the nucleus of V. ma- 

 milla is properly examined, it will be found that it is distinctly 

 spiral, but has the apex of the first whorl of the nucleus excentric 

 or bent on one side ; and this is not very uncommon in several 

 species of Chrysostoma and Fusus, &c. 



The species of Scapha may be thus divided, according to the form 

 and surface of the whole of the nucleus : — 



I. Spire of nucleus regular, with a central apex. 

 a. Nucleus large ; whorls crenulated near the suture. 



S. vespertilio. S. rutila. 



S. nivosa. S. magnifica. 



S. Sophia. 



b. Nucleus large ; whorls smooth. 



S. aulica. S. leucostoma. 



S. Deshayesii. 



c. Nucleus moderate or small; spire often suhcylindricalf generally 

 truncated or deciduous. 



S. punctata. S. Ferussacii. 



S. colocyntha. ' S. pacifica. 



S. magellanica. S. concinna. 



S. javanica. 



II. Spire of nucleus rather irregular', the apex excentric, lateral. 



S. fusiformis, apex moderate. S. mamilla, apex very large. 



Notice of Notopteris, a New Genus of Pteropine Bat 



FROM THE FeEJEE IsLANDS. By Dr. J. E. GrAY, F.R.S., ETC. 



Among a large collection of the skins of Mammalia, Birds, Fishes, 

 Crustacea, &c., sent to the British Museum by the Lords of the 

 Admiralty, which were collected by Mr. Rayner, Dr. Macdonald, 

 and the Medical Officers of H.M. Ship ' Herald,' during the voyage 

 to the Feejee and other Pacific Islands, under the direction of Captain 

 Denman, R.N., there are two specimens of a small Pteropine Bat 

 from the island of Viti, which has the elongated face and the general 

 appearance of the Kiodote (Macroglossus), but is provided with an 

 elongated, free, slender, tapering tail, nearly as long as the hind legs, 

 which, like the tail of most Bats having this member enclosed in 

 the interfemoral membrane, is arched, the tip being bent ventrally 

 or downwards. 



Considering that the best genera of Bats are those established on 

 the external conformation of the members, I am inclined to propose 

 for this animal a new generic designation ; and I have no doubt that, 



20* 



