Mr. A. Adams on new Mollusca from China and Japan. 303 



minato-ovata ; plica parietali transversa, ralida, mediana ; labro 

 margiue creuato. 

 Hab. Hulu-Shan Bay j 3 fathoms. 



A species very mucli resembling C. Mariella, A. Ad., in style 

 of sculpture, the whorls being plicate at the upper part, and 

 transversely lii-ate at the lower part. 



Genus Monoptygma, Gray. 

 Monoptygrna ccelata, A. Adams. 



M. testa elongato-ovata ; spira producta, acuminata, alba, solida, 

 transversim valde lirata, liris distantibus, interstitiis puleherrime 

 lineis elevatis insculptis ; anfractibus normalibus quatuor, convexi- 

 usculis ; suturis canaliculatis ; apertura oblouga ; labio incrassato ; 

 plica parietali obliqua, mediana ; labro margiue crenato. 



Hab. Mino-Sima ; 63 fathoms. 



This is a short, elongately ovate species, with channelled su- 

 tures. It is the only member of the Monoptygma type I have 

 met with in the Sea of Japan, the other species I have recently 

 described being found in the Gulfs of Pe-chili and Lian-tung. 



Genus Menestho, Moller. 

 1. Menestho exarata, A. Adams. 



M. testa acuminate- ovali, alba, solida, imperforata ; anfractibus b\, 

 planiusculis, transversim exaratis ; apertura ovata, postice acumi- 

 nata ; labio subincrassato, simplici. 



Hab. Hakodadi Bay ; 16 fathoms. 



This shell somewhat resembles an elevated grooved Odostomia 

 without any plait. The axis is imperforate, and the shell is 

 solid. If not a Menestho, possibly it may be considered a 

 MacrocheUus. 



2. Menestho sculptilis, A. Adams. 



M. testa pyramidali-turrita, sordide alba, solidiuscula, imperforata ; 

 anfractibus 4^, planiusculis, transversim sulcatis, sulcis concinne 

 punctatis ; apertura late ovata ; labio simplici, antice vix effuso. . 



Hab. Mino-Sima; 63 fathoms. 



This shell is something like a Myonia without a fold on the 

 inner lip ; it is of a pyramidately turreted form, and, were the 

 axis perforated, would be regarded as an lole. 



Genus A math is, A. Adams. 

 Testa subulata, laevis, polita ; anfractibus simplicibus. Apertiira 



