BY E. M. JOHNSTON, F.L.S. 



85 



Genus Stylifee. Brod. (221.) 

 Syn. — Stylina. 

 Shell hyaline, pellucid, thin, globular or subulate, smooth, 

 polished ; whorls numerous ; apex very sharp, some- 

 times bent ; nucleus sinistral ; aperture sub-oval, 

 angulated posteriorly, rounded in front; inner lip 

 smooth, arcuated ; outer lip slightly sinuous, thin, 

 simple, no operculum. Dist.— Europe, West Indies, 

 Polynesia, Australasia. 





(xxxi.) Family Tuebonillid^;. 



(Shell white, slender, elongated, many whorled, mostly 

 longitudinally ribbed or spirally striate.) 



Genus Turbonilla. Eisso. (222-225.) 

 Shell slender, elongated, many whorled ; whorls plaited ; apex 

 sinistral; aperture simple, ovate ; peristome incomplete ; 

 columella not plaited; operculum horny, sub-spiral. 

 Dist. — World-wide. Eange from low water to 90 

 fathoms. 



Genus Aclis. Loven. (226.) 



Shell minute, like Turritella ; usually spirally striated ; apex 

 sinistral ; aperture oval ; outer lip prominent ; axis 

 slightly rimate, operculate. Dist. — Europe, North 

 America, Australasia. 



Genus Odostomia. Fleming. (227-229.) 

 Syn. — Odontostomia. 



Shell subulate or ovate, typically smooth; apex .sinistral; 

 aperture ovate ; peristome not continuous ; columella 

 with a single tooth-like fold ; operculum horny, indented 

 on the inner side. Dist. — Universal, from low water 

 to 40 fathoms. 



Sub-Genus Paethenia. Lowe. 



Shell thin, turriculate, imperforate, usually milk white, under 

 a very pale, thin, epidermis ; whorls ribbed or striate, 

 sometimes cancellate, vanishing at periphery of last 

 whorl. Dist. — Japan and Tasmania. 



Genus Eltjsa. A. Adams. (230.) 

 Shell subulate, turreted ; whorls longitudinally plicate ; aperture 

 ovate ; inner lip with a single plait ; outer lip often 

 lirate within. Dist. — China, Japan, Australasia. 



Genus Syenola. A. Adams. (231-232.) 

 Shell subulate, straight, vitreous, banded, polished ; whorls 

 flat; suture impressed; aperture oblong; inner lip acute, 

 obliquely plicate in the middle ; outer lip simple, acute. 



