508 BULLIDiE. 



C. cYLiNDRACEA, Peniiant. 



Moderately large, cylindrical, more or less truncated at both 

 ends ; crown not truly umbilicatcd, only indented ; aperture 

 peculiarly bluntly rounded below ; fold distinct. 



Plate CXIV. B. fig. G, and (Animal) Plate V. V. fig. 3. 



Lister, Hist. Concli. pi. 714, f. 70. 

 Bulla cylindracea, Penn. Brit. Zool. ed. 4, vol. iv. p. 117, pi- 70, f. 85. — Mont. 

 Test. Brit. vol. i. p. 221, pi. 7, f. 2 ; vol. ii. p. 584.— 

 Maton and Rack. Trans. Linn. Soc. vol. viii. p. 127. — 

 Rack. Dorset Catalog, p. 43, pi. 18, f. 22.— Tukt. Conch. 

 Diction, p. 22. — Fleming, Brit. Animals, p. 293. — John- 

 ston, Berwick. Club, vol, ii. p. 30, with animal. — Brit. 

 Marine Conch, p. 142. — Alder, Cat. Moll. Northumb. and 

 Durh. p. 27, animal. — Dillw. Recent Shells, vol. i. p. 496". 

 — Wood, Index Testaceolog. pi. 18, f. 57. — Desh. Lam. 

 Anim. s. Vert. (ed. Desh.) vol. vii. p. 675. — Hanl. Conch. 

 Book Spec. p. 18. — Searles Wood, Crag Moll. p. 1 75, 

 pl.21,f. 1. 

 „ Oliva, Gmelin, Syst. Nat. p. 3433, badly (from figures). 

 „ cylindrica, Pulteney, Ilutchins, Hist. Dorset, App. p. 40. — DoNOV.Brit. 



Shells, vol. iv. pi. 120, f. 2. 

 „ umhilieata (not of Mont.), Johnston, Berwick. Club. vol. ii. p. 30, 

 young. 

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

 Volvuria cylindrica, BroWxN, Illust. Conch. G. B. p. 3, pi. 19, f. 36, 37. 

 Bidla {Cylichna) cylindmcea, A. Adams, Sow. Thesaur. Conch, vol. ii. p. 590, 

 pi. 125, f. 132. 



The shell we arc about to describe is by far the largest 

 native species of this group. It has a narrow elongated 

 cylindrical shape, being three times as long as it is broad, 

 and almost equal in diameter throughout, being scarcely in 

 the least contracted above or perceptibly dilated below : 

 there is no retusion either in the middle, and both extre- 

 mities are more or less subtruncated. It is tolerably strong, 

 more or less glossy, and excepting in a rare variety (cab. 

 Hanley) which is decorated with a few spiral lines of brown 



