GASTEROPODA. 83 



This is not a vcr}^ rare species. I have presumed this to be the shell described by 

 M. Philippi, although my specimens have an obtuse apex, not corresponding in that 

 character vrith what he calls " apice acuto." The furrows between the ribs are rather 

 wider than the ribs themselves, and run into the suture at the lower part, but not at 

 the upper, from the overlapping of the succeeding volution, and the whorls are rather 

 more convex than those represented at the above reference. The first five or six 

 volutions present an elongato-conical form, after which the shell becomes nearly 

 cylindrical. It is slender and elegant, rather more so than our figure represents, and 

 covered with numerous nearly vertical ribs, the last whorl ha\dng as many as twenty- 

 four. I am not acquainted with the recent shell, and have trusted for this identification 

 to the figure and description by M. Philippi. 



9. Chemnitzia unica(?). Mont. Tab. X, fig. 9, 9«. 



Tdrbo cxicus. Mont. Test. Brit. p. 299, t. 12, fig. 2, 1803. 



— Turt. Conch. Diet. p. 209, 1819. 



Parthenia pallida (?). Lowe. Zool. Proc. p. 42, 1840. 

 Chemnitzia pallida (?). Phil. En. Moll. Sic. vol. ii, p. 136, t. 9, f. 8. 

 TuRBONiLLA SUBULATA. S. JTood. Catalogue 1842. 



C/i. Testa furritd, su6iilafd, acieulatd, c/racili, politd ; anfradihus numerosis, convexins- 

 culis ; longitudinaliter plicatis ; plicis confertis, obliqiiis ; suturis distinctis ; aperturd sub- 

 quadratd ; columella redd. 



Shell turriculate, slender, elongate and tapering, smooth and gloss)'^ ; whorls 

 slightly convex, longitudinally costated ; costae numerous, close, and oblique, inter- 

 mediate spaces transversely striated (r) ; suture deep and distinct, with a sub- 

 quadrate aperture and straight columella. 



Axis, \ of an inch. 



Locality. Cor. Crag, Sutton. Recent, British Seas. 



My cabinet contains five specimens of this slender shell, which is assigned to 

 Cli. unica with doubt. It resembles a verj^ slender variety of Clt. elegantissima, but difi"ers 

 from that species in being more elongate. The volutions in my specimens project 

 more at the lower part than they do above ; and the furrows between the costas 

 appear to terminate before reaching the suture ; whereas, in elegantissima, they run 

 into it. My specimens are evidently much rubbed, and do not show the inter- 

 mediate striae distinctly. Our shell differs materially from the figure referred to, 

 {Chemn. pallida, Phil. t. 9, f. 8,) in being more slender, the costae more inclined, 

 and the volutions less convex ; it has a greater resemblance to Ch. (/racilis of that 

 author (pi. 24, f. 11), but the furrows in our shell appear to terminate just before 

 reaching the suture, and the costae incline a little, but do not cun'e. The aperture 

 is subquadrate, ya'Ca. a straight columella, which has a slight thickening in the middle 

 like an incipient fold. 



