inhabiting the seas of Great Britain and Ireland. 339 



more pointed and the last volution being proportionably larger, 

 in its colour and glossy appearance, and in its being umbilicated. 



9. Odostomia turrita. 



Odostomia turrita, Hanley in Zool. Proc. 1844 ; Thorpe, 36. fig. 10. 

 " Odostomia striolata," Alder MSS. 



Guernsey (Mr. Metcalfe). Oxwich Bay near Swansea ; Loch 

 Fyne ; Zetland, five miles east of Lerwick, in forty fathoms water. 

 Ilfracombe (Mr. Alder). Rare. 



As the solitary specimen from which Mr. Hanley's description 

 was taken is so battered and wants one of the principal characters 

 of this species (the transverse striae), I have added a description 

 from my own specimens. 



Testa cylindrica, solidiuscula, nitida, alba, opaca, striis con- 

 fertis concentrice notata; anfractus 6, convexiusculi, turriculati, 

 ultimo dimidiam testae subsequante ; apex prominulus ; sutura 

 distincta; apertura subrhomboidea, subtus rotundata et parum 

 effusa, superne ad angulum exteriorem contracta ; peristoma in 

 columellam vix reflexum ; denticulus parvus, acutus ; umbilicus 

 angiistus, in adultis tantum discernendus. Long, -j^^, lat. ~q unc. 



Differs from plicata in the volutions being more convex, in the 

 concentric striae which are distinctly visible by the aid of a mag- 

 nifier, and in the contraction of the aperture at its upper and 

 outer angle. 



10. Odostomia cylindrica. 



Odostomia cylindrica. Alder in Ann. Nat. Hist. 1844, p. 327.pl. 8. 

 fig. 14. 



Ilfracombe ; Land's End ; Kilkee (Alder). Cork Harbour ; White- 

 sand Bay, Cornwall ; Scarborough (Mr. Bean). Burrow Island, 

 Devonshire (Rev. M. Beevor and Mr. Barlee). Guernsey (Mr. Bar- 

 lee). 



1 1 . Odostomia plicata. 



Turbo plicatus, Mont. 325. tab. 21. fig. 2 ; Turt. 222. 



Voluta plicata, Mat. and Rack. Linn. Trans, viii. 131. 



Valuta plicatula, Dillwyn, Descr. Cat. i. p. 509. 



Melania (subg. Eulima) plicata, Forbes, Malacologia Monensis, 16. 



Odontostomia plicata, JefFr. in Mai. and Conch. Mag. (1839) pt. 1. 

 p. 34. 



Odostomia unidentata, Maclaurin in Trans. Berw. Nat. Club (1842), 

 p. 40. 



Odostomia plicata, Macg. 154. 



Odostomia Anna, id. 157 (described from a small and worn spe- 

 cimen). 



Jaminia plicata, Br. 21. pi. 8. fig. 10. 



Odostomia turrita. Aid. Cat. 51. 



Salcomb Bay, Devon (Montagu). Western coasts and Dublin 

 Bay (Turton). Cruden Bay, Aberdeenshire (Macgillivray). Lums- 



