139 



Crithe atomaria. T. mmutissima, lactea, ovularis,levigata: 

 apertura coarctata, larainis ventralibus ad octo. Axis 0.5 ; diam. 

 0.3 millim. Inhabits the China Seas. W. S. 



Shell very minute, milk-white, glossy, ovate, somewhat acute 

 at extremities, most so at summit, where there is a delicate groove ; 

 aperture very narrow and uniformly so ; rostrum short, slightly 

 recurved ; ventral lamina; directly transverse, about eight in num- 

 ber, and, as thejipass into the aperture, giving the appearance of 

 coarse denticles on the pillar. 



This peculiar little shell is the only one of the genus yet ob- 

 served. The animal is citron-colored, the viscera slate-colored, 

 the eyes reddish black, very small. 



Persicula tantilla. T. minuta,oliviformis, Candida, polita: 



spira occulta : apertura linearis antice vix dilatata ; labro apicem 



paullo superante, simplici acuto ; columella plicis obliquis acutis 5 



munita. Axis 3 ; lat. 1.5 millim. Inhabits China Seas. W. S. 



It has the form of P. imbricata. 



Marginella (Glabella) lepida. T. minuta, ovato-trigona, 

 tenuis, polita, lactea : spira elevata lateribus concavis ; anfr. 3 : 

 apertura angusta ; sinu postice parvo ; labro incrassato concinne 

 crenulato ; columella denticulis acutis 4, postico minimo, et plica 

 siphonem circumambiente instructa. Axis 3 ; diam. 2 millim. 

 Inhabits China Seas. W. S. 

 Allied to M. Icevis. 



Marginella seminula. T. minuta, ovoidea, polita, tenuis, 

 lactea : spira obtusa, vitro cooperta : apertura antrorsum dilatata, 

 postice rotundata ; labro simplici postice subsinuato et in plicam 

 posticam columella; desinente; plicis 4 perobliquis ; columella 

 nuda. Axis 4 ; diam. 3 millim. From a Gorgonia in False Bay, 

 Cape of Good Hope. W. S. 



Foot of the animal twice as long as the shell, truncate in front, 

 dilated at sides, lanceolate and carinate posteriorly; mantle not 

 enveloping the shell ; tentacles long subulate ; eyes lateral near 

 the base of vibracula. The shell belongs to the section Prunum 

 of Martini. 



Volvarina ptjella. T. parva, ovato-cylindracea, subflex- 

 uosa, polita, ex eburneo flavescens : spira depresso-conica ; anfr. 



