inhabiting the seas of Great Britain and Ireland. 341 



Carron, Ross-shire ; Lerwick Sound, and five miles eastward, in forty 

 fathoms. Clonakilty, Ireland (Mr. Dillwyn). Northumberland coast 

 (Mr. Richard Howse, jun.). Exmouth (Mr. Clark). West coast of 

 Scotland ; Guernsey (Mr. Barlee). 



Monstr. spirse basi complanato et late umbilicato. 



Torquay (Dr. Battersby). 



13. Odostomia conoidea. 



Auricula conoidea (Fer.), Phil. i. p. 143. 

 Odostomia unidentata, Thorpe, 35. fig. 11. 

 Turbonilla plicata, Lov. 19. 



Odostomia Eulimoides, Jeffr. in Ann. Nat. Hist. 1847, p. 17. 

 Odostomia plicata, Wood, Cr. Moll, part 1. p. 85. tab. 9. fig. 3 a-b. 

 Guernsey (Mr. Metcalfe). Skye, Oban, Loch Fyne, and other 

 parts of the west coast of Scotland (Mr. Barlee). 



Var. a. spira productiore; anfractibus rotundatis et non 

 carinatis. 

 Odostomia plicata var. (3, Wood, /. c. 

 Torquay ("Dr. Battersby). 



The variety appears to show specifically distinct characters ; 

 but I have only seen a single specimen, which is not in good 

 condition. 



Var. b. minor et plus conica. 

 Birtabuy Bay, co. Gal way (Mr. Barlee). 



~ 14. Odostomia diaphana. 



Testa cylindrica, tenuis, diaphana, nitida, glabra, alba; an- 

 fractus 4, convexiusculi, sensim increscentes, ultimo f- testae sub- 

 aequante ; apex obtusus ; sutura obliqua, profunda ; apertura 

 ovato-oblonga, infra rotundata et subeffusa, superne exteriore 

 angulo fere contracta; peristoma in columellam reflexum et sub- 

 incrassatum ; plica indistincta. Long, y 1 ^, lat. ^ ¥ unc. 



Hab. Exmouth (Mr. Clark). Very rare. 



Differs from obliqua in its smaller size, in the last whorl not 

 being so disproportionately large and tumid, and the spire being 

 consequently more tapering, in being quite smooth and not (as 

 in that species) spirally striated at the base of each volution, and 

 in the nearly total absence of a fold on the pillar. 



Z 15. Odostomia obliqua. 



Odostomia obliqua, Alder in Ann. Nat. Hist. 1844, p. 327. pi. 8. 

 fig. 12. 



Tynemouth (Alder). West coast of Ireland (Mr. Thompson). 

 Falmouth ; Exmouth ; Caswell Bay near Swansea ; Bantry Bay ; Cork 

 Harbour. Burrow Island (Mr. Bean and Mr. Barlee). West coast 

 of Scotland (Mr. Barlee). 



