DECAPODA. 385 



Both the young and adult specimens in my cabinet are highly attractive, 

 from still retaining their fine red and bright blue markings. 



G. rugosa, Leach, 

 Is noticed as Irish by Mr. J. V. Thompson. The specimens which I 

 have seen were mostly found in the stomach of the cod-fish. Dr. J. L. 

 Drummond thus obtained two of them from fish brought to Belfast mar- 

 ket. In a cod taken near Carrickfergus, I once found a fine male G. 

 rugosa ; its length of body from base of eyes to extremity of tail-plates, 3 

 inches ; its arm from base to point of claw, 5^ inches. Another individual 

 was found in the mouth of a haddock captured at Killough, County 

 Down. Dr. Ball in one instance procured three specimens from the sto- 

 mach of a cod taken at Youghal. Dr. Leach remarks " that the G. rugosa 

 appears to be a very rare species in Britain," and so may it likewise be 

 considered on the Irish coast. It is probably one of those species not to 

 be found in numbers anywhere. 



A G. rtignsa has been kindly sent to me from Portpatrick by Captain 

 Fayrer, R.N. Several small individuals were dredged alive in water from 

 110 to 140 fathoms in depth off the Mull of Galloway. See Annals, 

 vol. X. p. 23. None of them exceeded H inch in length of body. 



Among the genera of Crustacea which possess a luminous property 

 when living, Gdlathea is included, and the species particularized is the G. 

 amplectens, Fabricius (M'Culloch's West. Isles, Scotland, vol. ii. p. 192), 

 observed by Sii- Joseph Banks on the coast of Brazil. It is perhaps not 

 worth remarking, that in a dead specimen of G. rugosa I observed the 

 same property. On the evening of the second day after it had been kept 

 in a warm room, the entire soft portion of its under surface was highly 

 luminous. 



G. squamifera, Leach, 



Is marked Irish in Mr. J. V. Thompson's catalogue. It is our most 

 common species of Galathea, and is found on all sides of the island. ' It is 

 not uncommonly dredged up by us in the Loughs of Strangford and Bel- 

 fast, the specimens being generally of a small size. In the Ordnance col- 

 lection are examples from Portrush, near the Giant's Causeway. At La- 

 hinch. County Clare, two of the G. squamifera were procured by us under 

 stones between tide-marks. Specimens from Youghal and the western 

 coast are in Dr. Ball's collection. 



Captain Fayrer, R. N., has favoured me with this species from Port- 

 patrick. 



G. nexa, Embleton. 



I have found it in the stomachs of cod-fish brought from the coasts 

 of Down and Antrim to Belfast market ; and in Dr. Drummond's collection 

 are specimens which were similarly procured. A comparison of one of 

 these with an original specimen in Dr. Johnston's possession, proved 

 (what from its agreement with the description and figure I had previously 

 little doubt of) the identity of the species. 



Genus Palixurus. 

 P. vulgaris, Leach. 



The spiny lobster is found sparingly on the North, but commonly on 

 the South coast. Smith in his History of Kerry remarks, that one side of 

 Dingle Bay " is noted for having very large cray-fish," and in his History 



2c' 



