Genus OBELIA.

O. vitrea, Penn. (sp.).

North of Ireland.

In middle of July, 1847, I saw a few at Holywood, the largest about 12 inches in diameter: they were pure hyaline, with a rich brown spot in the centre, and rays of the same colour nearly reaching the margin.

? O. cruciata, Temp.

North of Ireland.

Genus OCYROE.

Genus CHRYS EORA,

C. tuberculata, Penn. (sp.).

"This and the preceding are badly observed species," Prof. E. Forbes.

"A. aurita, Linn. (sp.).

Genus AURELIA.

"North, West, and East coasts," Prof. E. Forbes. A species so called has been before noticed as Irish, but as more than one has passed under the name, the true species according to Prof. Forbes is here repeated.

Co. Down, Bangor, July 4th, 1846, G. C. H. and W. T. A. aurita. Of all sizes in profusion. We watched their graceful motions in a deep pool for a long time, with extreme interest.

July 20th, 1849.-A N. W. wind has been blowing for the last two days, and has been the means of the greatest number of these being thrown ashore at Holywood Warren that ever I saw. A quarter of a mile of the beach, or so far as I walked, and for about twelve yards in breadth from low-water mark inwards, has fully one-fifth of its entire surface covered with them.

Middle of July, 1847, a great number on the beach at Holywood Warren.

End of July, I did not see one there.

"A. bilobata, Forbes MSS. Portrush." Prof. E. Forbes.

R. Cuvierii, Blainv.

Genus RHIZOSTOMA.

Belfast, August 6, 1838.—I received a fine specimen of this Medusa from Edmund Getty, Esq., whose attention was called to it yesterday by an old fisherman seventy years of age, who stated that "a large starfish, he had not seen the like of before," was lying on the beach near Holywood (Belfast Bay). The specimen exactly accords with Blainville's figure of R. Curierii and with the Med. undulata of Borlase, as quoted by Pennant and Fleming. Its total length is 18 inches, the body 74, and thence to extremity of peduncles 10 inches; entire outer surface of the body, which is 12 inches in diameter, granulated over like the rind of an orange or lemon. The body is almost hyaline, with a very slight tinge of dusky

yellow; peduncles and their appendages delicately tinged with lilac and roseate hues. Weight 6 lbs.

Youghal, Dr. Ball.

"C. Lamarckii, Péron.

Genus CYANEA.

County Galway coast. July, 1840." Dr. Ball, W. Thompson, Prof. Forbes.

End of July, 1847.-Judging chiefly from its dark reddish-brown (mahogany colour) hue, in which it is strikingly different from the latter, is abundant at Holywood Warren, having taken the place of the next species, which was plentiful in the middle of July.

C. capillata, Linn. (sp.).

North and West of Ireland.

Mid. July, 1847.-What I take to be this species from its light colour, &c., abundant of all sizes to near 18 inches diameter at Holywood Warren.

The same stinging species at same place and of huge size (same as thrown on the beach, nearly a yard in diameter, i. e. feelers, &c., and appearing as one mass), I remarked the first about ten days ago.

The two last named are the only native stinging species, according to Prof. Edward Forbes. One of these species at least makes its appearance in Belfast Bay in multitudes at the beginning of August.

North of Ireland. ("Probably the fry of some" species.) Prof. E. Forbes.

ZOOPHYTES.

ORDER HYDROIDA.

Genus CLAVA.

C. multicornis, P. S. Pallas.

Plentifully on Fuci, within tide-marks, at entrance to Strangford Lough. Oct., 1839. Clifden, Connemara, W. T.

C. capitata, Müller.

North and East of Ireland.

66

C. minuticornis, Müller.

Adhering to F. vesiculosus, at White House Point, Belfast Lough. Oct., 1840." Templeton.

C. pusilla, Gaertner.

Genus CORYNE.

(T. muscoides, Linn.). A few specimens of a Tubularia which I obtained in Strangford Lough, in January, 1835, parasitical on Fucus nodosus, and subsequently between tide-marks at the island of Ireland's Eye, off the Dublin coast, were placed in my collection under this name. Having supplied a specimen to my friend Dr. G. Johnston, he remarked upon it-" "This is what Agardh and Lamouroux say is the real T. muscoides of Linn., but not of any other author excepting Müller and Fabricius-you are the first to discover it on our shores." In so far as my limited observation extends, this would seem to be a littoral, T. indivisa and T. larynx to be deep-water species.

C. Listeri, Van Ben. (sp.).

I obtained this zoophyte attached to stones between tide-marks at Ballyholme, Belfast Bay. Both polype and polypidom agreed in every character of form and colour with the description given in Dr. Johnston's work, but I cannot think this and the Coryne (C. squamata, Johnst. Brit. Zoop., pl. 2, figs. 2 & 3, 1st edit.) which is commonly found on the Fuci (especially Fucus nodosus) of our shores, the same species. This latter generally forms masses at the base of the branches and around the stem of the plant named: each individual rises singly from its base, as represented in the figures referred to. The one is a branched, the other a simple, species: the polypidom is horny (Tubularia-like) in S. Listeri; in the other soft and fleshy.

C. lacustris, Allman.

Genus CORDYLOPHORA.

In the dock of the Grand Canal, Dublin, Professor Allman.

E. rameum, Johnst.

Genus EUDENDRIUM.

Black Rock, Dublin Bay, Dr. Hassall.

E. ramosum, Ellis.

Noticed by Templeton as found in Dublin Bay; it occurs not uncommonly on shells dredged in deep water on the North-East coast.

Found sparingly around the coast of Ireland, investing shells. The figure in Ellis's Corall., pl. XVII., is a good representation of the species as it has occurred to me; I have never met with E. ramosum, even in a dried state, in which it could be confounded with T. larynx (see Brit. Zoop., p. 117). The specimens which have come under my observation were always of a stronger texture, and of an extremely different habit from any variety of T. larynx, having moreover a brownish horn-colour, instead of the hyaline aspect of that species. More might be said on the subject, but a comparison of Ellis's fig. of T. ramosa, pl. XVII., with Dr. Johnston's T. larynx, will exhibit other differences sufficiently. W. T.

I found this species along with many other Zoophytes in the trawl-nets of the Howth (Co. Dublin) fishermen, in April, 1835; have dredged it in Belfast Bay, and found it parasitic on oysters and the Capulus Hungaricus from the Down coast, but rarely more than one or two specimens on any occasion. Obtained at Magilligan by Mr. Hyndman, 1838. Ellis's figure in plate XVII. is a good representation of the species as it has occurred to me. Killery Bay, W. T.

Courtmasherry Harbour, Co. Cork, Prof. Allman. On Pinna in my collection from Cork.

T. indivisa, Linn.

Genus TUBULARIA.

Dublin Bay, Prof. Harvey, 1834; Youghal, Miss Ball, 1836; Belfast and Strangford Loughs, Mr. Hyndman and W. T.

Fine specimens 9 inches in height obtained by Dr. Ball in Dublin Bay, Sept., 1839.

Dredged in the open sea along the Antrim coast, by Mr. R. Patterson. On a Balanus attached to an oyster dredged at Greencastle, Londonderry, W. T. Youghal, Miss Ball.

T. larynx, Ellis.

Belfast and Strangford Loughs, Mr. Hyndman and W. Bay, Dr. Ball.

This is not uncommonly found attached to T. indivisa; but in Belfast and Strangford Loughs is chiefly parasitic on Desmarestia aculeata. From about every inch or so of the stem and main branches of the plant the tubes issue somewhat in a whorled manner (to use a botanical expression) to about the distance of one or two inches on every side.

In Belfast Bay, Mr. Hyndman dredged a fine specimen 3 inches in height, and as much in breadth, and which springs from a single base. The tubes are simple throughout. W. T.

Thoa halecina, Lam.

Genus THOA.

Clew Bay and Antrim, Down, and Dublin coasts, W. T. Killery Bay, W. T. Magilligan, Co. Londonderry, Mr. Hyndman. The specimens

brought thence by Mr. Hyndman are remarkably fine, their ordinary height being 9 inches; some of them, too, branch profusely, so as to occupy nearly as much space in breadth as in height:-one specimen had attained the height of 12 inches. Nov., 1842, attached to Pecten maximus in Belfast market; the shells stated to have been dredged in the Bay. W. T.

T. Beanii, Johnst.

Procured by dredging in Belfast Bay, where it in some situations seems to take the place of T. halecina. Before it was described as a distinct species, its peculiarities, independently of the remarkable ovaries, were noticed by Mr. Hyndman and myself; its general aspect or habit first attracted our attention. Instead of the rigid "herring bone" appearance of T. halecina, it is somewhat flexible and graceful. Although not mentioned in the description, this difference is observable in the plates of the British Zoophytes.

Among Zoophytes collected in Dublin Bay, by Prof. Harvey, in 1834, and kindly sent to me, were examples of this species. Adherent to oysters dredged at Killough, Co. Down. W. T.

T. muricata, Johnst.

For the only Irish specimen, a mere fragment of this Thoa which I have seen, I am indebted to Dr. Hassall, who found it near the Giant's Causeway. W. T. 1842.

S. polyzonias, Linn.

Genus SERTULARIA.

Dublin Bay, 1834, Prof. Harvey. Youghal, Miss Ball. Magilligan, Co. Londonderry, Mr. Hyndman. This is one of our most common Sertularia, on the coasts of Down and Antrim, and indeed those of Ireland generally; it is usually attached to Alga and Zoophytes, more especially to Halidrys siliquosa and Flustra foliacea. The largest and finest specimens I have seen were from deep water, where, even on our northern coasts, they in more than one locality attained the magnitude mentioned by Templeton of 5 inches in height. See his description of S. pinnata. The Sertularia which commonly passes under the name of polyzonias in Ireland is the form figured in Ellis, and which is considered by M. Edwards distinct from the erect form represented on the same plate. He names the flexuous form S. Ellisii.

All the specimens in my collection from various localities, whether growing in a flexuous or erect state, winding round the stem of Algæ, or expanding in an arborescent form, with a single main stem (if it may so be called), have the cells with a toothed rim, and the vesicles toothed. I have not seen any vesicles with such an orifice as is represented in the erect form by Ellis, plate 2, fig. A.

S. rugosa, Linn.

On Flustra foliacea collected at Magilligan, Co. Londonderry, by Mr. Hyndman, 1838. On same species from Bootle coast, Liverpool, Mr. Henry Johnston, 1840; and on same, dredged at Sana Island, off the Mull f Cantire, Mr. Hyndman, 1841. ·

S. rosacea, Linn.

Dublin Bay, 1834, Prof. Harvey. April, 1835.