30 MOLLUSCA FROM THE CRAG. 



whorl forms an imperfect sinus at the upper angle of the aperture. Buc. graniferum, 

 Dujardin (Geol. Trans, of France, 1837, vol. ii, part 2, pi. 20, f. 11, 12), strongly 

 resembles this species, but appears to have the costae more apart ; in this shell they 

 are contiguous, with a difference also in the striae. Buc. granulatum, Philippi (En. 

 Moll. Sic. vol. i, p. 226, pi. 11, f. 22), appears a different species. The shell figured 

 (fig. 3) is rather above the ordinary size, which rarely exceeds half an inch. 



4. Nassa pkopinqua. 7. Sow. Tab. Ill, fig. 2. 



Buccinum propinquum. J. Sow. Min. Con. t. 477, fig. 2, 1824. 



— costulatum. Broc. t. 5, fig. 9, 1814. 



Nassa propinqua. S. Wood. Catalogue 1842. 



N. Testa elongaio-ovatd, longitudinaliter cost/data ; costis {circa 23) nodulosis, striis 

 transversis decussatis ; anfractibus convewis ; striis prope suturam profundioribus exaratis, 

 angulatis ; labio sup erne unidentato ; labro crasso i?itus denticulato. 



Shell elongato-ovate, longitudinally costated, with about twenty-three small 

 costae, sulcated or ridged ; ridges carried over the ribs, and nodulous ; one ridge 

 isolated and distinct near the suture ; one tooth upon the body whorl within the 

 mouth ; outer lip thickened and denticulated within. 



Axis, f of an inch. 



Locality. Red Crag, Sutton and Walton Naze. 



This species is by no means rare, though seldom found in good condition. Its 

 distinguishing character is the granulated ridge near the suture, which is separated 

 by a wider sulcus than any of the others. The outer lip is thickened only in its 

 adult state ; the shell is, however, sometimes ornamented with an obtuse varix, where 

 the animal has enlarged its shell, and has produced another half volution. It is 

 possible this may be the Buc. costulatu/n, Brocchi, which I do not know ; the figure 

 given by that author is rather more elongate than our shell. 



5. Nassa elegans. Leathes. Tab. Ill, fig. 1. 



Buccinum elegans. J. Sow. Min. Con. t. 477, fig. 1, bene, 1824. 



Nyst. Coq. foss. de Beige, p. 576, pi. 43, fig. 13, non bene. 

 — Morris. Catalogue of Brit. Foss. p. 139, 1843. 



Nassa elegans. S. Wood. Catalogue 1842. 



N. Testa turritd, angustd, longitudinaliter costatd, transversim striata; striis paucis 

 elevatis ; apice acuminato ; anfractibus 7 — 8 convexis, suturis profundis ; aperturd orbicu- 

 lari ; labio superne uniplicatd, labro intus denticulato. 



Shell turreted and elongate, with an elevated spire, costated longitudinally, 10 

 — 11 in the last volution, striated or ridged transversely; volutions convex, and 

 suture deep j outer lip thickened, dentated within. 



Axis, f of an inch. 



Locality. Red Crag, Walton Naze. 



I have not seen this shell from any other locality, although in the Cliff at Walton 



