244 Horr & Braumont—Survey of Fishing-grounds, W. Coast of Ireland, 1890--91. 
Station 148, seven miles 8.S.W. of Gregory Sound, Aran, 38 fathoms, sand. 
April 9th, 1891. 
Marine Laboratory.—Blacksod Bay, 6—8 fathoms, 29th March, 1899. Numerous 
examples, divergent in some characters from the type. We have observed the 
same peculiarity in specimens from the estuary of the Tamar, and propose to 
revert to the matter on a future occasion. 
Previous Irish Records.—Ofi Valentia (A. M. N.*): Port Magee entrance, 
Valentia Harbour, 15 fathoms (A. O. W.*). 
Distribution.—Shetland; east Scotland; Durham; Liverpool Bay (A. M. N.*): 
Trish Sea (A. O. W.): Dogger Bank (T.8.): off Plymouth and Tamar estuary. 
Norway; Denmark; Holland; N. W. France (A. M.N.*): Baltic, North Sea 
(Ehrenbaum),. 
Schistomysis arenosa (G. O. Sars). 
Not in the Survey Collection. 
Marine Laboratory.—Off the White Strand, Ship Sound, Inisbofin, 2-5 fathoms, 
20th and 22nd July, 1899, very abundant. 
No Previous Irish Record. 
Distribution.—Starcross, Devon (A. M. N.*): Plymouth (W. Garstang!): 
Mediterranean (A. M. N.*). 
Genus Mysis, Latreille. 
Mysis relicta, Lovén. 
Museum, Dublin.—Lough Neagh, near mouth of Antrim river, per Dr. R. F. 
Scharff. 
Previous Irish Record.—Lough Neagh (A. M. N.*). Mysis chameleon, recorded 
by Bell, on the authority of W. Thompson, from the stomachs of pollen in Lough 
Neagh, can only be referable to this species. 
Distribution.—Lakes Venern, Vettern, Malar, etc., Sweden; Lake Mjosen, 
Norway; Lake Onega, Russia; Lake Ladoga, Putko, ete., Finland; northern 
part of Gulf of Bothnia; Lakes Michigan and Superior, in America (A. M. N.*). 
Lough Neagh appears to be regarded by geologists as due to a comparatively 
late subsidence of the basalt of the Bann valley, but the exact period is disputed. 
It may be presumed that J/, relicta did not enter the Lough by the navigation 
canal; it certainly cannot have ascended the Bann, which is in places much too 
rapid to permit of such an achievement. ‘The most closely allied marine species 
is M. oculata, the sub-Arctic habitat of which is perhaps of some importance in 
considering the age of the Lough. 
