TURRITELLA. 173 



pi. 15, f. 5, 6 (badly). — Turt. Conch. Diction, p. 216, f. 83. 

 — DiLLW. Recent Shells, vol. ii. p. 871. — Wood, Index Testa- 

 ceolog. pi. 32, f. 137. 

 Slrombiformis terebra. Da Costa, Brit. Conch, p. 112, pi. 7, f. 5, 6. 

 Turbu ungulinus (not Linn.), MiJLL. Zool. Danic. Prodr. p. 242. — Pulteney, 



Hutchins, Hist. Dorset, p. 45. 

 Ttirritella cornea. Lam. Anim. s. Vert. (ed. Desh.) vol. ix. p. 255 (fide Loven, 

 Kiener, Reeve). — Kiener, Coquil. Vivantes, Turrit, pi. 13, 

 f. 3. — Reeve, Conch. Icon. vol. v. Turrit, pi. 7, f. 35. 

 „ communis, Risso, H. N. Europe Merid. vol. iv. p. lOG, f. 37. — 



pHiLiPPi, Moll. Sicil. vol. ii. p. KiO. 

 „ iurcbra (not Lara.), Fleming, Brit. Animals, p. 302. — Johnston, 

 Berwick Club, vol. i. p. 2G7. — Macgilliv. Moll. Aberdeen, 

 p. 141. — Brit. Marine Conch, p. 188. — Brown, Illust. 

 Conch. G. B. p. 9, pi. 8, f. 56.— Alder, Cat. Moll. Northumb. 

 and Durh. p. 60. — Blainv. Faune Franqaise, Moll. p. 305. 

 — Philippi, Moll. Sicil. vol. i. p. 190. 

 „ lAnncBi, Desh. Exped. Sclent. Moree, Moll. p. 146. 

 „ uiifjulina (not Turbo img. of Linn.), Loven, Index Moll. Scand. p. 21. 



This abundant shell is usually of an elongated tur- 

 reted shape, but is sometimes so abbreviated in form as 

 only to be pyramidal turreted, at other times (yet rarely 

 so in Britain) so produced as to be acuminated-turreted. 

 It is usually rather thin (for the genus) than otherwise, is 

 not very glossy, slightly diaphanous, and either stained 

 with diiFerent intensities of uniform ferruginous brown, or 

 else variegated with flexuous longitudinal stains of that 

 colour on a livid ground : a snow-white variety is likewise 

 met with in Scotland. The volutions, of which we have 

 counted nineteen on a full-grown individual, taper to an 

 extremely fine point, which terminates in a kind of de- 

 pressed mammillation (as in the genus Coccum). Each of 

 the first ten (or characteristic) whorls is girt with three 

 principal spiral ridges, which are narrow, rather distant, 

 more or less acute, simple (not broken into regular tuber- 

 cles), and neither traversed them.selves nor interstitially 

 by longitudhial striio ; the midtile of the three ridges is 

 the most prominent, yet is scarcely perceptibly broader 



