Rayed Animals found in Ireland. 303 



4 brown tentacula arising from the margin, nearly equi- 

 distant ; the centre produced into a long dark brown ap- 

 pendage somewhat thickened in the middle. Found in 

 the pools on the limestone rocks at the Whitehead ; June 

 25. 1812, moving with a pretty quick but steady motion, 

 by expanding and collapsing the body, which was so ex- 

 tremely transparent, that scarcely any part was visible, but 

 the dark brown appendage, and the marginal tentacula. 

 The marginal tentacula were dilated at their base. — Ap- 

 pendix. Medusa scintillans of Macartney is very common 

 at Bangor and Glenarm. — Bero<? Mull, pileus Gm. ? 

 Occasionally detected in our deep bays. — Cucumis Fab. 

 fulgens Macartney. A great number were found floating 

 in with the waves on the shore of Dundrum Bay, west of 

 St. John's Point. — Velella Lam. mutica Lam. Very 

 common at Magilligan, floating in on the water during 

 westerly winds. 



POLYPI. 



CARNO^SI. 



Actinia Lin. equina Lin., hemisphae'rica Penn. Common on 

 the rocks and stones on every part of the coast. While 

 engaged in sketching this species, which was immersed in 

 a bowl of sea water, considerable surprise was experienced, 

 on pressing it slightly, to see several completely formed 

 young ones, of different sizes, protruded from the mouth. 

 In every respect they resembled the parent, except in 

 the fewer number of the tentacula, which, in the very 

 smallest, and, it is presumed, the youngest, were only 4 ; 

 and they gradually increased in number as the animals 

 increased in size ; so that the age may, perhaps, be judged 

 of from the number of the tentacula. — A. senilis Lin., 

 crassicornis Bast. Lam. Common on the rocks at Ban- 

 gor, and other parts of the coast. The colour varies 

 from dark to more or less light red, and occasionally the 



* tentacula are beautifully variegated with dark and light 

 red bands, tinged with prismatic hues. — A. effce v ta Brug. 

 In great numbers on the rocks between Ballyholm Bay 

 and Groomsport, county Down; Sept. 1811. — A. sulcata 

 Pennant. Most probably the young of the preceding. 

 Found at Ballyholm Bay near Bangor, Sept. 1811. — 

 A. pedunculata Penn. Found in a pool on the rocks at 

 the north end of the Island of Rathlin : August, 1795. — 

 A. monile. {fig. 49.) With a cylindrical body of a light 

 cinereous green, marked with from 14 to 16 lines of bead- 

 like tubercles ; the circumference of the disk is also striated, 



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