312 APPENDIX. 



being deposited upon the internal cast ; while upon the matrix is exhibited the sculpture of the exterior 

 on which also are deposited similar crystals. Besides the present species, Mr. Acton has kindly given 

 me a specimen of Nana conglobata in the same state ; and although the last has not yet been found 

 in the Coralline Crag, I think there is every reason to believe the cast of this species, as well as the other 

 sandstone nodules previously noticed, are the littoral remains of a destroyed portion of what might have 

 been a purely sandy deposit of the age of the Older Crag. 



Tropuon Norvegicum, Chemnits. Tab. XXXI, fig. 1, a, b. 



Strombus Norvegicus. Chemn. Conch. Cab., vol. s, p. 218, t. 15", figs. 1497, 1498, 1788. 

 Fusus NoRWEGicus. Turt. Mag. Nat. Hist., vol. vii, p. 351, 1834. 



— Norvegicus. Ilowse. Ann. and Mag. Nat. Hist., vol. six, p. 162, pi. 10, figs. 1 — 4, 



1847. 



— — Forb. and Hani. Hist. Brit. Moll., vol. iii, p. 428, pi. 107 and 108, 



fig. 7. 

 Tbitonium Norvegicum. Midd. Malaco. Rossica., part 2, p. 147. 

 — — Lov6n. Ind. Moll. Scaud., p. 11, 1846. 



Spec. Char. " T. oblongd, subidatd, albd, an/ractibus nex terelibus ; aperturd patuld ovatd, caudd 

 subadscendente, fauce ehurned." — Chemnitz. 



" Shell smooth, volutions six, rather flat, the lower one ventricose ; aperture twice the length of the 

 rest of the shell, and pure white ; outer lip much dilated, and smooth on the inner margin ; the edge sharp 

 and slightly reflected ; pillar smooth." 



Length of recent shell, -Xh inches. 



Locality. Red Crng, Sutton and Felixstow. Recent, British and Arctic Seas. 



A few fragments, or the young state of this species, have been for some time in my cabinet, but their 

 very imperfect condition rendered an assignment doubtful ; and until the discovery of the larger specimen, 

 which was obtained at Felixstow by Mrs. Henry Bartlet, of Ipswich, who has obligingly entrusted it to my care 

 for examination and representation, I was fearful to introduce the name into the List of British Fossils ; but 

 there is now very good reason to believe the above-named species was an inhabitant of our seas during the 

 period the Red Crag was deposited. Mrs. Barllet's specimen (fig. 1, a) consists of a considenible portion of 

 the shcU, with the outer lip and anterior canal destroyed : what remains corresponds so closely with the 

 existing species, that there is every probability of its identity. Our shell is thin, has lost its outer coating, 

 and the suture in consequence is deepened ; upon the shell are still visible numerous, but somewhat obsolete 

 stria;. The fracture of the specimen appears to have been produced or accelerated by the inroads of a Chona 

 — a means of destruction not uncommon with the shells of the Crag. Being unable to give a detailed 

 description, I have taken the diagnosis from Chemnitz; he refers to ' Seba Thesaur,' vol. iii, t. 52, fig. 9? 

 175S, who was probably the first to notice the species. It is said to have been found in the Newer Tertiaries 

 of Sweden. 



Mr. Ilowse states having dredged the living shell, in sixty fathoms water, off the Durham coast. 



Tropho.v Turtoxi, Bean. Tab. XXXI, fig. 2. 



Fusu3 TuRTONi. Bean. Mag. Nat. Hist., vol. vii, p. 493, fig. 61. 



— — Howse. Ann. Nat. Hist., vol. xix, p. 163, pi. 10, figs. 6 — 10. 



— — Reeve. Conch. Icon. Fusus, vol. iv, pi. 20, fig. 83. 



— — /'Vie* and Hanleij. Hist. Brit. Moll., vol. ii, p. 431, pi. 105, figs. 3, 4, and 



pi. 106, figs. 2 — 1. 



