384 
CRUSTACEA. 
with these crabs, “ packed as close to each other as tiles on a roof! ” In 
June, 1838,1 found the P. platy elides in numbers beneath large stones at 
the island of Lambay, off the Dublin coast ; on the 1st of this month the 
females abounded in ova. At Lahinch, County Clare, this species occurred 
to Prof. Forbes and myself in July, 1840, between tide-marks, and be- 
neath the same stones P. lonyicornis was met with alive. Tory Island, 
Mr. Hyndman. 
P. lonyicornis, Edw. 
This species chiefly inhabits deep water on our coasts, but in some 
localities lives on shores exposed at the ebb of every tide. It has been 
dredged up in abundance in the Loughs of Strangford and Belfast, and in 
the open sea off the North-East coast of Ireland, in 1834, and subsequently 
by Mr. Hyndman and myself. It is generally found in connexion with 
large shell-fish brought up from deep water, such as oysters, horse-mus- 
sels ( Modiolus vulgaris), or clams ( Pecten maximus ), and shelters itself 
under any extraneous matter or natural roughness (as between the testa- 
ceous layers of an old oyster) sufficient for the purpose. Dr. Ball’s col- 
lection contains specimens from Youghal and Dublin Bay : — on the shore 
of the island of Lambay I have taken it alive, as well as at Lahinch on 
the western coast. 
Specimens of this crab have been sent me from the coast of Wigton- 
shire, Scotland, by Captain Fayrer, B,. N. 
3rd Section, Macroura. 
Genus Galathea. 
G. striyosa, Edw., 
Would appear to be distributed around the coast, but everywhere' in 
very limited numbers. Templeton notes it as found at “ Bangor, Co. 
Down, November, 1819, and in the stomach of a cod-fish.” It is enumer- 
ated in Mr. J. Y. Thompson’s catalogue, his specimen being probably 
from Cork. Two were captured by Mr. Hyndman and myself, when 
dredging in Strangford Lough in October, 1834 ; and others have subse- 
quently been added to my cabinet from the rocky coast of Antrim, as 
from Island Magee ; Glenarm ; the vicinity of the Giant’s Causeway; 
one or two only from each place : at the last-named, a couple of indivi- 
duals, which were brought to me alive in the month of June, were cap- 
tured under stones at low-water. The species may probably resort to the 
shallows to deposit their ova, which in these examples were ready for 
exclusion. The Ordnance collection contains the G. striyosa from Bel- 
fast Bay. Dr. Ball has a specimen from Dublin Bay : — its length of body 
is 4f inches ; arm from basal insertion to end of claw 4-| inches. 
In March, 1835, a G. striyosa from Portpatrick was kindly sent to me 
by Captain Fayrer, It. N. ; and on the beach at Newhaven, near Edin- 
burgh, I once picked up a very large one, which had probably been thrown 
out of some of the fishing-boats. At Ventnor, in the Isle of Wight, one 
which had been captured in a crab-pot was brought to me ; it was 5 ^ 
inches. in length from the points of the claws to the extremity of the tail- 
plates. 
