Mr. Thorn j)Son's Additions to the Fauna of Ireland. 481 



Lacuna riifa, Belfast aiid Strangford Loughs, Mr. Hyndman and 

 W. T. Rare. 



Brociis striatus. Brown's lUus., pi. 1. f. 13. Among shell-sand 

 brought from Bantrj- Bay in 1834, W. T. 



Lima subauricidata. Two odd valves dredged in Strangford Lough, 

 in Aug. 1837, by Mr. Hyndman and W. T. 



Modiola tulipa, Lam. A shell so named by Mr. Forbes was obtained 

 in Belfast Bay by Mr. Hyndman. 



Gibbsii, Leach. Obtained by dredging, etc. in Clew Bay (co. 



Mayo) during an excursion made to the west of Ireland in July 

 1840, by Mr. R. Ball, Mr. E. Forbes, Mr. Hyndman, and my- 

 self. 



Cr en ell a decussata. 



Mytilus decussatus, Laskey, Wern. Mem., vol. i. p. 394. pi. 8. f. 17. 

 A few odd valves dredged in Strangford Lough in Aug. 1837, 

 by Mr. Hyndman and W. T. Captain Brown has applied the 

 name of Crenella elliptica to this species. 



Mactra cinerea, Mont. Magilligan and Portmarnock, Mr. Hynd- 

 man. 



elliptica. Brown. Portmarnock, W. T. 



Donax rubra, Mont. In shell-sand from Portmarnock. Bundoran, 

 Mrs. Hancock. 



ZoOPHYTA. 



Hydra viridis, Linn. Obtained at Bandon (co. Cork) by Mr. Geo. 

 J. Alknan. 



Actinia viduata. Mull., Zool. Dan. Observed between tide-marks at 

 Lahinch (co. Clare) by Mr. Forbes and myself. We consider it 

 distinct in species from A. mesenibryanthemum. 



Anthea cereus, Johnst. Gsertner, Phil. Trans., vol. lii. p. 78. t. 1. 

 f. 1. In September 1835, I made a note of this species as 

 being the most common Actinia at Bally home Bay (co. Down), 

 where it was gregarious, forming in some places a continuous 

 fringe round large rock-pools and stones, exposed to view at 

 low water. In such quantity it is not now to be seen there, 

 having become gradually scarcer since the period mentioned. 

 In Dublin Bay and on the western coast this species likewise 

 prevails. It is commonly of a dull ash-colour throughout, but 

 wherever I have remarked it, some few individuals were to 

 be found of a green colour, with the tentacula partially or 

 wholly red. The A. cereus is doubtless one of the species 

 mentioned under another name by Mr. Templeton as found at 

 BaUyhome Bay (Mag. Nat. Hist., vol. ix. p. 303.), but in uncer- 

 tainty which of his should be referred to, I have thought it better 

 to notice the subject again. 



Cellepora ramulosa, Linn. Johnst., Brit. Zoop., p. 274. pi. 32. f. 4, 

 5. Obtained at Youghal by Miss Ball; Portmarnock, 1835, 

 W. T. 



Cliona celata, Grant. " In perforations of the shell of the oyster 

 (Ostrea edulis)" taken in Belfast Bay and elsewhere on the 

 north-east coast, \V. T. 

 Ann. ^ Mag. N. Hist. Vol. vii. 2 I 



