HYDROIDA. 
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 maximus), 
on which, from various localities on the coasts of Dowli and Antrim, I 
have found it growing. On old oyster-shells dredged in 3^ fathoms 
water in Belfast Bay, Mr. It. Patterson. Attached to Flustra foliacea, 
collected at Magilligan, by Mr. Hyndman, and on Flustra truncata sent 
me from Portpatrick, in 1837, by Capt. Fayrer, It. N. On Venus Is- 
landica, dredged at Dalkey, Dublin Bay, 1840, W. T. 
March , 1843. — I observed several single stems growing from an old 
musket dredged 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 digitata. I have obtained a few 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 Ball. 
S. argentea, Ellis. 
Dublin Bay, Prof. Harvey, 1834. Magilligan, Mr. Hyndman. Antrim 
and Down coasts, grows occasionally in brackish water and shallow pools ; 
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 Bay (Co. Down), into 
