Descriptions of Two New Species of Cylindrella. 155 



field, in the Annals of the Lyceum, Vol. iv. p. 131, under 

 the name of C. inornatum. I have since received specimens 

 from M. Petit. 



XXII. — Descriptions of Two New Species of Cylindrella, 

 from Jamaica, West Indies. 



By the Hon. E. Ciiitty, of Jamaica, Corresponding Member. 



Head September 11, 1854. 



Cylindrella niegacheilst; 



Plate V. Figs. 1, 2. 



T. rimata, truncata, ovato-cylindricea, solida, sericina, rubro-fusca, infra 

 suturam purpureo-fasciata, striis confertissirnis obliquis elegantissime 

 sculpta ; sutura impressa ; anfr. superst. 7-8, ultimis subequalibus 

 ultimo adnato, basi obsoletissime carinata ; apertura rotunda; peristo- 

 mate valde expanso. 



Shell of the C. rosea group ; ovate cylindrical, very robust ; the 

 upper remaining whorls tapering suddenly ; deep plum color 

 with a lighter tinge of the same extending over the lower half 

 of the whorls, especially the fourth and fifth ; aperture of a 

 paler, dingy, plum color, with an elegant silky lustre, produced 

 by crowded, oblique, very fine strias, rather finer than in C. 

 zonata ; carina on the last whorl almost obliterate ; spire with 

 convex outlines ; narrower near the aperture, broadest about 

 the third or fourth whorl; apex truncate, with the loss of — 

 whorls ; whorls remaining 7, rather flattened, very slightly 

 margined on the lower side, with a slightly impressed suture. 

 Aperture, as in most other species of the G. rosea group ; lip 

 very much expanded, reflected, and thickened, especially in 

 the lower part ; appressed to the last whorl, as in C. nobilior, &c. 



Length, 1.05 inch ; diameter, .4 inch, at third whorl ; length 

 of aperture, .2 inch. ; length of lip, .4 inch. 



