130 Mr. A. Adams on new Mollusca from Japan. 



ultimo subvaricoso, ad peripheriam subrotundato ; apertura ob- 

 longa, antice producta ; labio subincrassato, antice reflexo. 



Hah. Okosiri; 35 fathoms. 



Genus Cerithiopsis, Forbes. 



I have described the following little shells as species of Ceri- 

 thiopsis; but, without au examination of the animals^ it is im- 

 possible to distinguish them from the Cerithideous group named 

 Bittium by Dr. Leach. With them I have associated some shells 

 regarded by me formerly as dextral Triphorides, but which I 

 now consider to be nearer allied to Cerithiopsis, from which they 

 are distinguished by a prolongation of the fore part of the aper- 

 ture, and by their whorls being crenulate instead of cancellate. 



1. Cerithiopsis rosea, A. Adams. 



C. testa rosea, subulato-turrita ; anfractibus 8^, convexis, costellis 

 longitudinalibus et liris trausversis cancellatis, anfractibus liris 

 duabus (in anfractu ultimo tribus) instructis, basi Isevi ; apertura 

 rotundata, antice emarginata ; labio brevi, recto, antice oblique 

 truncato. 



Hub. Tsu-Sima ; 16 fathoms. 



3. Cerithiopsis cerina, A. Adams. 



C. testa subulato-pyramidali, gracili, sordide alba, quasi cerea ; an- 

 fractibus circa 14, planiusculis, liris subtuberculatis transversis 

 quatuor (interstitiis valde punctatis) instructis ; anfractu ultimo 

 basi plauo ; apertura ovata, canale brevi sinistrorsum directo ; 

 labio tortuoso ; labro intus sulcato. 



Hah. Mino-Sima; 63 fathoms. 



3. Cerithiopisis baculum, A. Adams. 



C. testa subulata, gracili, pallida brunnea; anfractibus circa 13, 

 convexiusculis, costellis longitudinalibus et liris trausversis valde 

 cancellatis, liris in anfractu ultimo tribus, in cseteris singulis duabus ; 

 apertura subquadrata, canale brevi ; labio brevi, recto, oblique 

 truncato ; labro in medio obtusim angulato. 



Hah. Mino-Sima ; 63 fathoms. 



4. Cerithiopsis clavula, A. Adams. 



C. testa subulato-pyramidali, pallide fusca ; anfractibus circa 1 4, 

 convexiusculis, costellis longitudinalibus et liris transversis valde 

 cancellatis, anfractibus liris tribus (in anfractu ultimo quatuor) 

 instructis, liris ad costas nodulosis ; basi Isevi ; apertura subqua- 

 drata, antice emarginata ; labio brevi, recto ; labro margine recti- 

 usculo. 



Hah. Mino-Sima J 63 fathoms. 



