AMPHIPODA. 
395 
perfect to be determined. The species on which the genus was founded 
was taken between Madeira and Barbadoes. Mr. H. Goodsir added the 
genus to the British Fauna from examples obtained on the East coast of 
Scotland. 
Genus Themisto. 
T. brevispinosa, Goodsir. 
In September, 1835, I obtained an individual of this species in rock- 
pools between tide-marks at Bangor, Co. Down. 
SECOND LEGION— EDEIOPHTHALMATA. 
ORDER AMPHIPODA. 
Genus Talitrus. 
T. locusta, Latr. 
Abundant and general. 
Genus Orchestia. 
O. littorea , Leach. 
In J. Y. Thompson’s and Mr. Templeton’s lists. 
O. ? 
Bangor, Co. Down, 1835, W. T. ; distinct from O. littorea. 
Genus Dexamine. 
D. spinosa, Leach. 
Belfast and Strangford Loughs ; Ballywalter ; Newcastle, Co. Down. 
Genus Gammarus. 
G. locusta , Fabr. 
J. V. Thompson’s and Mr. Templeton’s catalogues. 
G. Jluviatilis , Edw. 
Common throughout the waters of Ireland, from North to South. I 
have found the stomach of the Salmonidce, from Lough Neagh, often en- 
tirely filled with it. Abundant in Lough Erne. 
G. marinas, Leach. 
Strangford Lough, 1837, Mr. Hyndman and W. T. ; Ballysodare, Co. 
Sligo, Mrs. Hancock. 
Noticed by Leach as found on the South coast of Devonshire, and by 
M. Edwards on the coast of France. 
G. campylops , Leach. 
Taken at high-water in the tidal river Lagan, above the bridge at Bel- 
fast, May, 1836, Mr. Hyndman and W. T. 
Shore of Loch-Ranza, Isle of Arran, where the species was discovered 
by Leach, the only locality hitherto noticed. 
