30 MOLLUSCA FROM THE CRAG. 



imperfect sinus at the upper angle of the aperture. Buc. (/raniferum, Dujardin (Geol. 

 Trans, of France, 1837, vol. \\, part 2, pi. 20, f. 11, 12), strongly resembles this 

 species, but appears to have the costse more apart ; in this shell they are contiguous, 

 ■with a difference also in the stripe. Hue. (jramdatmn, Philippi (En. Moll. Sic. vol. i, 

 }). 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. ./. Soro. Tab. Ill, fig. 2. 



BucciNUM PROPiNQUUM. J. Sow. Min. Con. t. 4/7, fig- 2, 1824. 



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

 Nassa PROPiNauA. S. Wood. Catalogue 1842. 



IV. Testa elongato-ovatd, loiiffitudinaliter costulaid ; costis {circa 23) nodiilosis, ■siriis 

 transversis decussatis ; anfractihus convexis; striis prope suturam profundioribiis exaratis, 

 anyidatis ; lahio superne unidentato ; labro crasso intus denticulato. 



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 Bm. costulaimn, Brocchi, which I do not know ; the figure given by 

 that author is rather more elongate than our shell. 



'a"- 



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



BucciNXJM ELEGANS. J. Sow. Mill. Con. t. 477, fig. 1, bene, 1824. 



— N>/st. 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, JongHudinaliter costatd, transversim striatd ; striis paiicis 

 elevatis ; apice acuminata ; anfractUms 7 — 8 convexis, suturis pro/imdis ; aperturd orhicu- 

 lari ; labia superne uniplicatd, labro inttis dentiadato. 



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 M'ithin. 



Axis, 2 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 



