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



apertura ovata, postice acuminata ; plica parietal! tenui, mediana, 

 obliqua ; labro simplici, 



Hob, Gulf of Pe-chili ; 5 fathoms. 



Most like M. punctigera, A. Adams, but more slender and 

 transparent, with longer whorls, and with a thin inner lip ; the 

 transverse grooves, moreover, are not so coarsely punctate. 



2. Mijonia scitula, A. Adams. 



M. testa subulato-ovata, alba, opaca, nitida ; anfractibus 4, planius- 

 culis, transversim sulcatis, sulcis distantibus, concinne punctatis, 

 suturis impressis ; anfractu ultimo magno, elongato ; apertura 

 ovata, antice dilatata, postice acuminata ; plica parietali conspicua, 

 obliqua ; labro simplici. 



Hab. Mino-Sima ; 63 fathoms. 



A small species, somewhat similar in appearance to M. puncti- 

 gera from the Gulf of Pe-chiii, but shorter and more ovate. 



Genus Vanesia, A. Adams. 



Testa subulata, rimata, tenui ; anfractibus numerosis, planis. Aper- 

 tura ovata, postice acuminata, antice rotundata, integra ; labio tenui, 

 subreflexo ; labro margine simplici, acuto. 



This shell closely resembles a thin Melania. The only known 

 marine genus which it appears to approach is Mesalia, from 

 which, however, the general character of the shell and the form 

 of the aperture at once distinguish it. There is no river near 

 this part of the coast, nor have I detected any species of Melania 

 in Manchuria. 



Vanesia trifasciata, A. Adams. 



V. testa rimata, subulata, tenui, corneo-lutescente ; anfractu ultimo 

 fasciis tribus transversis rufo-fuscis ornato ; anfractibus 9, planatis, 

 rugosis, erosis, lineis longitudinalibus et transversis subtiliter de- 

 cussatis ; apertura ovato-acuminata, antice integra, rotundata ; 

 labio tenui, subreflexo ; labro simplici, acuto. 



Hab. Sunday Island, coast of Manchuria; dredged from 20 

 fathoms. 



Genus Diala,**A. Adams. 



Testa imperforata, ovato-conica, ssepe semiopaca, vane picta ; anfrac- 

 tibus simplicibus. Apertura ovata, antice integra ; labio rectius- 

 culo ; labro simplici. 



This is an ill-defined, though natural, group, allied to Alaba, 

 H. & A. Adams, and might form a portion of a family to include 

 Litiopa and Planaxis. They are found between the Coralline and 

 Laminarian zones. By some they would be called Hydrobice. 



