80 MOLLUSCA 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 costa? 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 costa? in our figure are scarcely erect enough. 



3. Chemnitzia costaeia. S. Wood. Tab. IX, fig. 3, 3 a. 



Tukbonii.la costaeia. S. Wood. Catalogue 1842. 



Ch, Testa turritd, subulatd ; anfractibus numerosis, convexiusculis ; longitudinaliter 

 costatis ; costis obliquis, obtusis, confer tis ; transversim sulcatis ; labro incra-ssato, intus 

 denticulato. 



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

 costa? oblique, obtuse ; transversely striated or sulcated ; suture distinct ; aperture 

 subquadrate ; outer lip thickened, and dentated within. 



Axis, f of an inch. 



Locality. Cor. Crag. Sutton. 



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

 cylindrical, and is transversely striated or sulcated; the costa? are oblique, inclining 

 a little to the left. It is beautifully grooved or sculptured, the lines being carried 

 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 stria? 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. ritfa, 

 in having fewer costa?, 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 a. 



Turbo nitidissimus. Mont. Test. Brit. p. 299, t. 12, fig. 1, 1803. 

 Turritella nitidisbima. Flem. Brit. An. p. 304, 1828. 



Ch. Testa pusilld, turritd, subulatd, Iceviyatd, politd ; anfractibus convexiusculis, vel 

 subconoideis, apice obluso ; aperturd subovatd ; labro acuto, intus laviyato. 



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. 



