80 xAIOLLUSCA FROM THE CRAG. 



My cabinet contains about half a dozen specimens of this species, which appear to 

 correspond with the figure and descriptions above referred to. The volutions are 

 rather flat, but project a little, which leave a slight shoulder at the upper part, and 

 cause the sutures to be deep and distinct. The transverse impressed striae, or rather 

 sulci, are about six or seven in number on each whorl, and these are continued over 

 the base. The costas are nearly vertical and straight, and from eighteen to twenty in 

 number on ^the last volution. The enlarged drawing in the very able work by 

 M. Philippi, referred to above, is a good representation of our shell. The costae in our 

 figure are scarcely erect enough. 



3. Chemnitzia costaria. S. IFood. Tab. IX, fig. 3, 3 «. 



TuRBONiLLA COSTARIA. S. Tf^ood. Catalogue 1842. 



Ch. Testa turritd, subulatd ; anfradibus mimerosis, convexiusculis ; longitudinaliter 

 costatis ; costis ohliquis, obtusis, confertis ; transversim sulcatis ; labro incrassato, intus 

 denticulato. 



Shell elongate, turriculate, tapering; volutions 8 — 10; longitudinally costated ; 

 costae oblique, obtuse ; transversely striated or sulcated ; suture distinct ; aperture 

 subquadrate ; outer lip thickened, and dentated within. 



Axis, I of an inch. 



Locality. Cor. Crag, Sutton. 



This species is by no means rare. It resembles much Ch. eleganiissima, but is less 

 cylindrical, and is transversely striated or sulcated ; the costae are oblique, inclining a 

 little to the left. It is beautifully grooved or sculptured, the lines being earned over 

 the ribs. The lower part of the outer lip projects a little, so as to give an obliquity to 

 the ribs, which are about twelve in number on the last volution. These ribs terminate 

 at the edge of the base, but the transverse striae are continued over it. There is no 

 appearance of any fold upon the columella. The inside of the outer lip is dentated. 

 It appears to differ from Ch obliquata, Phil. (vol. ii, p. 137, t. 24, f. 10), in being much 

 larger, and striated. It differs also from Ch. rufa, in having fewer costae, and in those 

 being more inclined ; on the last volution they are about thirteen in number. 



4. Chemnitzia nitidissima(?). Mont. Tab. IX, fig. 4, 4 «. 



TuKBO NiTiDissiMUs. Mont. Test. Brit. p. 299, t. 12, fig. 1, 1803. 

 TURRITELLA NITIDISSIMA. Fleiu. Brit. All. p. 304, 1828. 



Ch. Testa pusilld, tiirritd, subulatd, IcEvigatd, politd ; anfradibus convexiusculis, vel 

 subconoideis, apice obtuso ; aperturd subovatd ; labro acuta, intus lavigato. 



Shell turriculate, tapering, smooth, and glossy ; volutions slightly convex, or rather 

 conoidal ; apex obtuse ; aperture subovate ; outer lip sharp, with a deep and distinct 

 suture. 



Axis, \ of an inch. 



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



