330 MOLLUSCA. \ 



Genus LoTTlA. 



L, virg'mea, MuUer. 



In Mr. Hyndman's collection (Belfast) are a few specimens of this shell 

 — the first obtained on the shore of Belfast Bay by Mrs. M'Gee, the 

 others found by Mr. H. adhering to oysters in Belfast market in 1831. 



L. testudinalis, Muller. 



Northern and eastern coasts. 



Neivcastle, Down, Sep. 1, 1836. Looked particularly for this shell on 

 stones opposite the village, at low-water, and found only two or three 

 dead ones. 



Bloody Bridcje, Oct. 22, 1851. I found two very fine living specimens 

 here at extreme low-water. I presume there are plenty, but I had a very 

 short time to look for them. 



AtGlassdrummond, tAvo miles southward of the Bloody Bridge, Patrick 

 Doran tells me it is common at low-water mark, and very fine. 



L. fulva, Muller. 



One of this species was found by Miss M. Ball several years ago in 

 company with Crania personata, Lam., on a stone di'edged in very deep 

 water at Youghal. 



ORDER CIRRHOBRANCHIATA. 



Genus Dentalium. 



D. dentalis, Turt. 

 Eastern and western shores of Ireland. 



D. entalis, Linn. 

 On most jjarts of the L'ish coast. 



ORDER CYCLOBRANCHIATA. 



Genus Patella. 

 P. vulgata, Linn. 



Common everywhere. 



P. pellucida, Linn. 



Of general occurrence. 



P. ancyloidcs, Forbes. 

 Obtained by Mr. Hyndman many years ago on oysters from Strangford 

 Lough. Lengths lines, breadth 2f, height If. The great resemblance 

 this shell bears to the Ancylus Jluviatilis is not confined to external ap- 

 pearance, but internally it exhibits the same bluish cast. 



Genus Chiton. 

 C fascicnlaris, Linn. 

 Generally distributed. 



