510 BULLION 



This is a common shell all round the British islands ; 

 we have taken it at various depths from one to ninety 

 fathoms, and it is not unfrequently cast on shore. It 

 ranges from the North sea to the Mediterranean, and dates 

 its presence within our area from the epoch of the coralline 

 crag. 



C. TRUNCATA (Adams?), Montagu. 



Longitudinally sulcated above ; crown truncated, volutions 

 visible. 



Plate CXIV. B. fig. 7, 8, and (Animal) Plate V. V. fig. 4. 



Bulla truncatula, BauG. Encycl. Meth. Vers, vol. i. p. 377 ? worn. — Gratel. 

 Sur les Bull. p. 20. 

 „ tru7icuta, AdajMS, Trans. Linn. Soc. vol. v. p. 1, pi. I, f. 1, 2, probably. — 

 Mont, (not Gmelin), Test. Brit. vol. i. p. 223, pi. 7, f. 5. — 

 Fleming, Brit. Animals, p. 293. — Brit. Marine Conch, p. 141, 

 — Johnston, Berwick. Club, vol. ii. p. 31. — Alder, Cat. 

 Moll. Northumb. and Durh. p. 28, animal. — Philippx, Moll. 

 Sicil. vol. ii. p. 96. — Searles Wood, Crag Moll. p. 176, 

 pi. 2I,f. 3. 

 „ retusa, Maton and Rack, Trans. Linn. Soc. vol. viii. p. 128. — Turt. 

 Conch. Diction, p. 23. — Dillw. Recent Shells, vol. i. p. 497. — 

 Wood, Index Testae, pi. 1 8, f. 59. 

 „ cylindrica, Scacchi, Notiz. p. 36, pi. 1, f. 14 (teste Philippi). 

 „ semisulcata, Philippi, Moll. Sicil. vol. i. p. 123, pi. 7, f. 19. 

 Bullina truncata, Macgilliv. Moll. Aberd. p. 191. 



„ pellucida, Macgilliv. Moll. Aberd. p. 334 (teste Jeffreys from types), 

 copied as Bulla jxllucidu in Brit. Marine Conch, p. 253. 

 Volvaria truncata. Brown, Illust. Conch. G. B. p. 4, pi. 19, f, 17, 18. 



„ retusa. Brown, Illust. Conch, G. B. p. 4, pi. 19, f. 12, probably. 

 Bulla {TornatMa) truncata, A. Adams, Sowerb}', Thesaur. Conch, vol. ii. p, 567, 

 pi. 121, f. 27. 



The shape of this minute and well-known shell is sub- 

 cylindrical, being slightly contracted rather above the 

 middle, and expanding towards the anterior extremity : it 

 is abruptly truncated (yet with the edge of the last whorl 

 rounded off, not angular) above, and well rounded below. 



