Mi*. A. Adams on new Mollusca from China and Japan. 303 



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

 margine creuato. 



Hub. Hulu-Shan Bay; 3 fathoms. 



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

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

 transversely Urate at the lower part. 



Genus Monoptygma, Gray. 

 Monoptijgma catlata, A. Adams. 



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

 transversim valde lirata, liris distantibus, interstitiis pulcherrime 

 lineis elevatis insculptis ; anfractibus normalibus quatuor, convexi- 

 usculis ; suturis canaliculatis ; apertura oblonga ; labio incrassato ; 

 plica parietali obliqua, mediana ; labro margine 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. 



31. testa acuminato-ovali, alba, solida, imperforata ; anfractibus 5£, 

 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 

 Macrocheilus. 



2. Menestho sculptilis, A. Adams. 



31. 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 Iole. 



Genus Amathis, A. Adams. 

 Testa subulata, lsevis, polita ; anfractibus simplicibus. Apertura 



