19G Mr. W. Thompson's Catalogue of the Land and 



5. Pisidium Hensloivianum, Jenyns, Monog. p. 20. pi. 21. f. 6, 7 ; 



Gray, Man. p. 285. pi. 1. f. 6. 

 Cyclas appendiculata, Turt. Man. p. 15. f. 6. 

 The addition of this species to our fauna is due to Edw. Waller, 

 Esq., who has favoured me with the inspection of a few specimens 

 which he procured at Finnoe, county Tipperary. 



6. Pisidium amnicum, Jenyns, Monog. p. 21. pi. 19. f. 2; Gray, 



Man. p. 285. pi. 1. f.5. 



Cyclas amnica, Turt. Man. p. 15. f. 5. 



Cardium amnicum, Mont. p. 86. 



Cyclas palustris, Drap. p. 131. pi. 10. f. 15, 16. 

 Although not very common, is widely distributed over the island, 

 and is known to me as occurring in every portion except the extreme 

 south. Capt. Brown noticed as localities — " in a stream near Clo- 

 nooney ; in the Grand Canal, and in the Liffey, plentiful," p. 508. — 

 in this river it attains a very large size. In the river Main, near its 

 junction with Lough Neagh ; in the rejectamenta of this lake near 

 Toome ; and in that of the river Lagan near Belfast, I have found 

 the P. amnicum. Ballitore (county Kildare), Limerick, and Miltown 

 Malbay are noticed by Mr. W. H. Harvey as localities — from the 

 river Barrow near Portarlington, the species has been sent me by 

 the Rev. B. J. Clarke. 



7. Pisidium cinereum, Alder, Supp. to Catal. in Newc. Trans. ; Gray, 



Man. p. 286. 



Is not common, but is widely distributed in Ireland, being found 

 in the north, east, west, and south. In Sept. 1833, I first met with 

 it in a moist spot in the wood at Holy wood House, county Down, and 

 have since obtained a very few specimens in different parts of this 

 county, and of Antrim. Among Pisidia collected at Youngrove near 

 Middleton (county Cork), by Miss M. Ball ; at Killereran (county 

 Galway) and Portarlington, by the Rev. B. J. Clarke ; and in the 

 neighbourhood of Dublin by T. W. Warren, Esq., is the P. cinereum. 



Fam. 2. Unionise, Gray, Man. 



Gen. 1. Anodon, Oken. 



A. cygneus, Turton, Man. p. 17. f. 8 ; Gray, Man. p. 289. pi. 1. f. 8. 

 Anodonta cygnea and A. anatina, Drap. p. 133, 134. pi. 12. f. 

 1, 2. 



Mytilus cygneus, Mont. p. 170. 

 The Anodon is known to me as found in suitable localities all over 

 the island, except in the extreme south. The Anodonta intermedia, 

 Pfeiffer, 1. 113. t. 6. f. 3, I have obtained in the rejectamenta of the 

 Lagan Canal near Belfast. Specimens from the Grand Canal near 

 Dublin, favoured me by Mr. R. Ball, are the A. cygnea, Pfeiffer, 1. 

 111. t. 6. f. 4 ; and Rossmassler, fig. 342; and in Mr. Hyndman's 

 collection is a very fine specimen 3j inches long and 6| broad from 



