LAMELLIBRANCHIATA. 341 



Genus Alasmodon. 

 A. marr/aritiferiis, Gray. 



This has for a long period been on record as an Irish shell ; from papers 

 published on the subject in the Philosophical Transactions, iSrc, Pennant 

 drew the information which appears in his British Zoology. 



It is indigenous to several of the northern counties, and to the South. 

 By Capt. BroAvn it is noticed as found " in the river Slaney, Enniscor- 

 thy," p. 505. In the cal)inet of Mr. Hyndman of Belfast are specimens 

 from the river Bann, and from the County of Donegal. This species in- 

 habits some of the tributary streams of Lough Neagh, and is jjlentiful 

 in the neighbourhood of Omagh, County '1 yrone, where, I have been 

 informed, it was taken in such quantity in 18o9, that the prisoners in the 

 jail were employed in breaking the shells for manure. Mr. Humphreys 

 of Cork notes it as abundant at Inchigeela, and as inhabiting the 

 small rivers which run through Blarney and Glanmire (Co. Cork) ; at 

 Curraghmore (Co. Waterford) it is stated by Dr. E,. Ball to be found. 

 The form to which M. Michaud has applied the name of Unio Hoissyi 

 is common to several localities in Ireland. 



" Here are rivers which breed pearles," p. 14. O'Flaherty's West or 

 H'lar Connaught. 



Jli/a nuinjaiitifera, river Anamoe, near the Seven Churches, Co. Wick- 

 low ; specimens thence given me by Mr. Warren, 1847. 

 . Oct., 18o9. Pear/s in Lough Eask (Donegal), Mr. Robert Barklie has 

 known taken in great quantity. 



Killymoon, Co. Tyrone. 



Fear/. 3hisscls found in the river commonly, and are sought for on ac- 

 count of the pearls by the people of Coagh. Mr. Hyndman, Oct., 1851. 



Alasmodon marciaritiferun, Nov., 1851. F. Davis brought me one 

 from the river Bush, Co. Antrim, where he saw a number last autumn. 



Family Camacad.e. 



Genus IsoCAKDIA. 

 /. cor, Linn. 



Found in Dublin Bay by Mr. James Tai'dy, and at Cork by Mr. Samuel 

 Wright, Brown. The folIoAving note appears in Mr. Templeton's MS. 

 journal, under October 28th, 18)1 : " Received a drawing of the Chama 

 Cor, from Mr. George Joy, taken by him from a specimen dredged up 

 at Bangor (Belfast Bay)." The species is known by Mr. J. K. Clealand to 

 have been dredged near the Copeland Islands, at the entrance of this bay. 

 The Giant's Causeway and Bantry Bay are named by Turton (C. D. and 

 Brit. Biv.) as localities in which it has been found ; but very rarely. 

 Berehaven, County Cork, Mr. John D. Humphreys. Dr. R. Ball some 

 years ago obtained a number of this species from Dublin Bay, where it 

 had previously, as well as elsewhere on the coast, been met with very 

 rarely : of late years, however, it has ])roved to be by no means rare in 

 that quarter. It is taken on the Kisli I'ank. 



Glassdrummond, County Down, P. Doran. 



