IIYDROIDA. 455 



scribes were collected in Dublin Bay, in 1834, by Prof. Harvey, and sent 

 to me at that time along with many other Zoophytes. They were at once 

 laid aside as examples of a species unrecognised as British, until a leisure 

 opportunity should arrive of studying the beautiful tribe to which they 

 belong. 



S. tamarisca, Linn. 



This species must have been accidentally omitted from Mr. Templeton's 

 Catalogue, as I find a named specimen in his collection with the locality, 

 " Belfast Lough," attached to it. A single example was once found by 

 Dr. J. L. Drummond, at Ballycastle, Co. Antrim. On an inspection of 

 the fishermen's trawl-nets at Howth (Co. Dublin) in April, 1835, a very 

 few specimens of S. tamarisca were found by Dr. Ball and myself, amid 

 a profusion of other species : a plume or two of it has generally occurred 

 to me among masses of other species at Portmarnock on the same coast. 

 It would seem to be very sparingly produced anywhere. W. T. 



S. abietina, Linn. 



Dublin Bay, common, 1834, Prof. Harvey. 



Coasts of Down and Antrim, W. T. 



Youghal, Miss Ball. From the northern, eastern, and southern shores, 

 I have seen examples of this species, those obtained from the fishermen's 

 nets at Howth, in 1835, being remarkably fine. 



S.Jilicula, Ellis. 



In Dr. J. L. Drummond's collection is a specimen of this coralline ob- 

 tained many years ago near Ballycastle by that most distinguished botan- 

 ist, R. Brown. Bangor (Down), Sept., 1835, and subsequently, W. T. 



This species is particularly partial to the clam-shell {Pecten maximiis), 

 on which, from various localities on the coasts of Down and Antrim, I 

 have found it growing. On old oyster-shells dredged in 3;^^ fathoms 

 water in Belfast Bay, Mr. R. Patterson. Attached to Flustra fuliacea, 

 collected at Magilligan, by Mr. Hyndman, and on Flustra truncata sent 

 me from Portpatrick, in 1837, by Capt. Fayrer, R. N. On Vcmis Is- 

 landica, dredged at Dalkey, Dublin Bay, 1840, W. T. 



March, 1843. — I observed several single stems growing from an old 

 musket cbedged off' the Gobbins. Several specimens attached to a piece 

 of limestone (bored by Spio calcarea) dredged in Belfast Bay, Nov-, 

 1846. 



Feb., 1848. — I obtained it on oysters from Clew Bay. 



S. operculata, Linn. 



Down and Antrim coasts, abundant, generally found on the stems of 

 Laminaria difjitatn. I have obtained a fcM' specimens of a black, as well 

 as many of a red, hue. Magilligan, Mr. Hyndman, specimens from 

 which, very large, attaining 6 inches and upwards in height. Ballysodare 

 Bay, Co. Sligo, Mrs. Hancock. Youghal, Miss IJall. 



8. argcntea, Ellis. 



Dublin Bay, Prof. Harvey, 1834. Magilligan, Mr. Hyndman, Antrim 

 and Down coasts, grows occasionally in brackish water and shallow pools j 

 a mass of it was once brought to me from one of the flood-gates to a dock 

 in Belfast, on which it had grown. I once found it plentifully attached 

 to dead mussels in a shallow pool in Dundrum 15ay (Co. Down), into 



