1855.] Chusan Shells. 1 19 



CHUSAN SHELLS. 



Described by W. H. Benson", Esq., Bengal Civil Service. Collected 

 by Dr. T. Cantor.* 



The following memoir was written so far back as 1841, and was embodied by 

 Dr. Cantor in his ' Descriptive Catalogue of animals collected at Chusan' drawn 

 up by order of Government, as already explained in an editorial note which will 

 be found at p. 624, of the last Vol. of this Journal. Dr. Cantor's report was not 

 as intended, published at a time when the result of his observations would have 

 excited the most interest, and what were novelties in 1841, have subsequently been 

 described and made known, by other zoologists. Mr. Benson's memorandum, 

 however, on the Chusan Shells is so complete in itself and so likely, notwithstanding 

 the time which has elapsed since it was written, to prove of assistance to Indian Con- 

 chologists, that the Editor has obtained the author's permission to publish it. — Ed. 



lN€iLARiA.f Nov. gen. 

 Corpus elongatum, postice attenuatum, repens, imdique velo mar- 

 ginatum. Tentaculis quatuor, superioribus oculiferis, inferioribus 

 integris. Eoramen commune latere dextro, non procul ab extre- 

 mitate antica veli situm. 



* List of Shells, presented to the Museum of the Asiatic Society, by Dr. Cantor, 



in 1842. 



K — From Chusan. 

 Helix ravida, Benson. 



tapeina, Benson. 



■ nanino'ides, Benson. 



Clausilia pluviatilis : Benson. 



- ■ aculus, Benson. 



Achatina erecta, Benson. 

 Planorbis papyraceus, Benson. 



hemisphcerula, Benson. 



compressus, Hutton. 



Limnaea plicatula, Benson. 



minor, Benson. 



Paludina quadrata, Benson. 



lecytho'ides, Benson. 



(Bithinia) lonyicornis, Benson. 



(Bithinia) striatula, Benson. ^ 



t From Incite, a gutter, with reference to the gutter-like channel, which divides 

 the mantle from the foot. 



B 



