30 MOLLUSCA FROM THE CRAG. 



imperfect sinus at the upper angle of the aperture. Sue. 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 costee more apart ; in this shell they are contiguous, 

 with a difference also in the striae. Sue. gramilatum, 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 PROPINQUA. /. 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 elongato-ovatd, longitudinaliter costulatd ; costis (circa 23) nodulosis, striis 

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

 angulatis ; labio superne unidentato ; labro crasso intus denticulate. 



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

 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, 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. costulalum, 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. 



TV! Testa turritd, angustd, longitudinaliter costatd, transversim striatd ; striis paucis 

 elevatis ; apice acuminato ; anfractibus 7 8 convexis, suturisprofundis; 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 ; 

 outer lip thickened, dentated within. 



Axis, | of an inch. 



Locality. Red Crag, Walton Naze. 



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



