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. Y. 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. rugosa has been kindly sent to me from Portpatrick by Captain 
Fayrer, It. 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 1^ inch in length of body. 
Among the genera of Crustacea which possess a luminous property 
when living, Galathea is included, and the species particularized is the G. 
amplectens, Fabricius (M‘Culloch’s West. Isles, Scotland, vol. ii. p. 192), 
observed by Sir 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. f 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, B. 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 Palinurus. 
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 
2 c 
