TURBONlLLIDiE. 319 



of sinus-band. M. spectrum, Morch. West Indies. A fossil 

 form from the Parisian eocene is referred to the genus. 



Genus YANESIA, A. Adams, 1861. 



Shell melaniform, decussated by longitudinal and spiral 

 ridges, subperforate, thin ; whorls very little rounded ; aperture 

 oval, rounded in front, entire, lip sharp. V. trifasciata, A. ' 

 Ad. China. 



Resembles a Melania. but is a true marine shell ; the character 

 of the apex and the animal are unknown, and the classification 

 is provisional. 



Genus EULIMELLA, Forbes, 1846. 



Shell elongated, turriculate, solid, smooth, polished; whorls 

 numerous, apex sinistral ; aperture subquadrangular, lip not 

 continuous, columella straight, without plications. 



Animal with short tentacles ; mentum lobed in front ; anterior 

 extremity of foot truncated. 



Section Baudonia, Bayan, 18T3. 



Shell aciculate, very long; whorls numerous, convex; aper- 

 ture small, subquadrangular, columella a little sinuous. Recent 

 and fossil. E. gracilis, Desh. Eocene of Paris basin. The 

 synon3"rns are Aciculina,'Dcsh., 1862; Baphium, Bayan, 1873; 

 Anisocycla, Monts., 1880. 



This section may well be merged in the topical group. 



Section OcEANiDA, Folin, 1870. 



Shell conical, elongated. E. graduata, Folin. West Indies. 

 I know nothing of this section. 



Section Liostomia, 0. Sars, 18T8. 



Shell relativel}' shorter, resembling Odostomia, subperforate; 

 aperture oval. L.. clavula, Loven. 



Section Microbeliscus, Sandberger, 1874. 



Shell cylindrically subulate ; whorls but slightlj^ convex ; 

 aperture rounded oval, columella arcuate. E. inaspecta, Fuchs. 

 L. Pliocene, Hungary. 



Section Stylopsis, A. Adams, 1860. 



Shell subulate, opaque, smooth, not polished ; whorls flattened. 



