GASTEROPODA. 83 



Locality. Cor. Crag, Sutton. Recent, Mediterranean. 



This is not a very rare species. I have presumed this to be the shell described 

 by M. Philippi, although my specimens have an obtuse apex, not corresronding in 

 that character with 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 having 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 a. 



Turbo unicus. Mont. Test. Brit. p. 299, t. 12, fig. 2, 1803. 



— Hurt. Conch. Diet. p. 209, 1819. 



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

 Chemnitzia. pallida {?). Phil. En. Moll. Sic. vol. ii, p. 13G, t. 9, f. 8. 

 Turbonilla subulata. S. Wood. Catalogue 1842. 



Ch. Testa turritd, subulata, aciculatd, gracili, politd ; anfractibus numerosis, convexius- 

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

 quad rata ; columella recta. 



Shell turriculate, slender, elongate and tapering, smooth and glossy ; whorls 

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

 mediate spaces transversely striated (?) ; 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 

 Ch. unica with doubt. It resembles a very slender variety of Ch. elegantissima, but 

 differs 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. gracilis of that author 

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

 the suture, and the costce incline a little, but do not curve. The aperture is sub- 

 quadrate, with a straight columella, which has a slight thickening in the middle like 

 an incipient fold. 



