32 MOLLUSCA FROM THE CRAG. 



Avis, 5 of an inch. 



Locality. Red Crag, Sutton. 



This species is at present rare ; I have met with but three specimens. It appears 

 to be quite distinct from any shell with which I am acquainted, and is considered 

 by Mr. Forbes to be identical with the shell above referred to, which was first found 

 in the Pleistocene beds of the Isle of Man. It is not known as a living species. 



8. Nassa conglobata. Broc. Tab. Ill, fig. 9. 



BucciNUM coxGLOBATUM. BroccM. p. 334, t. 4, fig. 15, 1814. 



— PUPA. Brocchi. p. 334, t. 4, fig. 14. 

 Nassa conglobata. S. Wood. Catalogue 1842. 



N. Testa ovatd, suhglohatd, injtatd, timidd ; transversim sidcatd ; avfractu ultimo 

 ffloboso, spird abbreviatd, ajjerturd subrotundd ; labio rugoso unidentato ; basi profimde 

 emarginatd ; labro intus denticulato. 



Shell ovate, subglobose, inflated, transversely striated, or sulcated ; spire short ; 

 mouth ovate, contracted at the upper part ; left lip expanded, rugose, with a tooth at 

 the upper angle of the aperture ; base short ; canal reflected ; outer lip dentate 

 within. 



Axis, 1| inch. 



Locality. Red Crag, Walton Naze. 



This is, I believe, at present, an unique specimen. Mr. Charlesworth was the 

 fortunate finder, and through that gentleman's liberality it now enriches my collection 

 of Crag. The specimen is a little worn, but there is no doubt of its identity ; I have 

 some Italian specimens in the same condition. The artist has given rather too great a 

 prominence to the ridges upon the surface. The outer lip is thickened externally, with 

 about nine or ten teeth upon the interior, and a few obsolete denticulations upon the 

 left or columellar lip, which was largely extended, though broken, in my specimen. 



9. Nassa prismatica. Broc. Tab. Ill, fig. 6. 



BncciNUM PRisMATicuM. (?) Broc. p. 337, sed non fig. 



— PUl. En. MoH. Sic. vol. i, p. 220, 1836. 



— Nxjst. Coq. foss. de Beige, p. 5/6, pi. 43, fig. 12, 1844. 

 BucciNUM ELEGANS. Bujard. Trans. Geol. Soc. of France, 1837, p. 298, pi. 20, fig. 3, 10. 

 Nassa microstoma. S. Wood. Catalogue 1842. 



N. Testd ovato-conoided, longitudinaliter costatd, striis elevatis transversis ; anfractibus 

 rotundatis ; suturis profundis; labio superne uniplicato, basi reflewd emarginatd; labro 

 extus incrassato, intus denticulato. 



Shell ovato-conical, longitudinally costated ; costae 1 5 on the last volution, covered 

 with elevated transverse striae ; whorls rounded and suture deep ; one tooth on the 

 upper part of the left lip ; aperture subcircular ; outer lip thickened, denticulated 

 within. 



Axis, I of an inch. 



