HELIANTHOIDA. 
463 
Genus Anthea. 
A. cereus, Johnst. 
In September, 1835, 1 made a note of this species as being the most 
common Actinia of Ballyholme 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 re- 
marked 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 
Ballyholme Bay (Mag. Nat. Hist., vol. ix. p. 303), but in uncertainty 
which of his should be referred to, I have thought it better to notice the 
subject again. 
I once saw it literally fringing, without a single gap, a small rock-pool 
about five yards long with their fully expanded tentacula ; the specimens 
were very large, one of them, the largest I had ever seen, was 6 inches in 
diameter from point to point of the opposite tentacula. They were all of 
the ordinary dull hue throughout. 
Genus Adam si a. 
A. maculata, Johnst. 
This extremely beautiful species, taken by dredging at Strangford 
Lough, in January, 1835, by Mr. Hyndman and myself, has subsequently 
occurred to us commonly there and in Belfast Bay — to Bulla lignaria as 
well as the larger Trochi it is occasionally found attached. Every shell 
that I have seen the A. maculata invest was tenanted by the Pagurus 
Prideauxii, Leach, a species which, extensively as the native Paguri 
have been collected by me, never occurred under other circumstances. 
On the Waterford coast, investing dead shells (inhabited by Pagurus 
Bernliardus) of Buccinum undatum , Dr. Farran. 
Genus Actinia. 
A. mesembryanthemum, Ellis. 
Common around the shores of Ireland, where the different seasons of 
the year have no effect that ever I could observe upon its colours (see 
Brit. Zoop., p. 212). 
A. margaritifera, Templeton. 
Copeland Isles (mouth of Belfast Bay), August, 1811, Mr. Templeton. 
West side Donegal Bay, Prof. Forbes. 
A. viduata, Mull. Zool. Dan. 
Observed between tide-marks at Lahinch (Co. Clare) by Prof. Forbes 
and myself. 
Bangor, Co. Down, July 4, 1836, G. C . H. and W. T. 
I found two very small specimens attached to a stone between tide-marks ; 
their colour was an olive green, with the stripes pure white from base to 
apex, and between the main stripes, when wider than usual, short white 
rays shot from the base a short way upwards. These specimens were 
quite free from sand, and seemed not to differ from A. mesembryanthe- 
