in the West of Ireland. 361 



Protopedata (Abildgaard). A single specimen in Ardbear 



Bay, on Laminaria saccharina. 

 Tanais Dulongii, B. & W. Among weed, Westport Bay. 

 Jcera albifrons (Montagu). Westport Bay. 

 Idotea trt'ciispidata, Desmarest. Young specimens, Ardbear 



Bay. 

 emarginata, Fabricius. The young in extraordinary 



abundance among Algaj between Ardbear and Mannin 



Bays. 

 Dynamene rubra, Leach. Young specimen among weeds, 



Clew Bay, 1 fathom ; and in rock-pools in Ardbear Bay. 



CLADOCERA. 



The following Crustacea belonging to this order were found 

 in the freshwater loughs in the neighbourhood of Clifden. It 

 is noticeable that where vegetation was abundant, Ento- 

 mostraca were very plentiful, but usually of the larger and 

 commoner species ; while in those lakes which were almost 

 bare of plants the specimens found, though few in number, 

 belonged often to small but rare species. 



Lynceus macrourus, Midler. 



elongatus (G. O. Sars). 



costatus ( G. O. Sars). 



Daphnia pulex (Linn.). 



Jardinii, Baird. 



Sida crystallina (Miiller). 

 Acantholeberis curvirostris(.MM. ), 

 Macrothrix rosea (Jurine). 

 Lathonura rectirostris (Miiller). 

 Bosmina longispina, Leydig. 

 Polyphemus pediculus (Linn.). 

 Drepanothrix hamata, G. O. Sars. 

 Eiirycercus lamellatus (Miiller). 

 Lynceus quadrangularis, Miiller. 

 harpse (Baird). 



guttatus (G. O. Sars). 

 truncatus, Miiller. 

 exiguus, Lilljeborg. 

 barbatus, Brady*. 

 nanus (Baird). 

 testudinarius, Fischer. 

 sphaericus, Miiller. 

 globosus (Baird). 



In addition to these species, Lynceus falcatus and L. ros- 

 tratus were found in Lough Moher, near Westport, p and in a 

 burn near the same place Lynceus trigonellus, L. uncinatus, 

 and Monospilus tenuirostris. The specimens which we refer 

 to L. rostratus'f differ somewhat from the same species as it 

 occurs at Belsay, in the county of Northumberland, the only 

 other recorded British habitat, in having a single small spine 

 at the postero-ventral angle of each valve, and in the rather 

 less hairy ventral margin : in other respects they seem to be 

 essentially the same. 



* Intellectual Observer, vol. xii. p. 423. 



t This and other little-known British species enumerated in the present 

 paper will be found described and figured in ' A Monograph of the British 

 Entomostraca belonging to the Families Bosminidae, Macrothricidse, and 

 Lynceidoe,' by the Bev. A. M. Norman, M.A., and George S. Bradv, 

 C'.M.Z.S. London : Williams & Norgate, 1867. 



