TURBONILLID^l. 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. Y. TRTFASCIATA, 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, Bay an, 1873. 



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 

 synonyms are Aciculina, Desh., 1862; Rapliium, Bayan, 1873; 

 Aniso.cycla, Monts., 1880. 



This section may well be merged in the typical group. 



Section OCEANIDA, Folin, 1870. 



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

 I know nothing of this section. 



Section LIOSTOMTA, 0. Sars, 1878. 



Shell relatively shorter, resembling Odostomia, subperforate ; 

 aperture oval. L. CLAVULA, Loven. 



Section MICROBELISCUS, Sandberger, 1874. 



Shell cylindrically subulate ; whorls but slightly 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, 



