in the West of Ireland. 361 



Proto 'pedata (Abildgaard). A single specimen in Ardbear 



15ay, on Latninaria saccharina. 

 Tayiais Didongii, B. & W. Among weed, Westport Bay. 

 Jmra alhtfrons (Montagu) . Westport Bay. 

 Idotea tricuspidata, Desmarest. Young specimens, Ardbear 



emarginafa, Fabricius. The young in extraordinary 



abundance among Alga3 between Ardbear and Mannin 

 Bays. 



Dynamene rubra, Leach. Young specimen among weeds. 

 Clew T3ay, 1 fathom ; and in rock-pools in Ardbear Bay. 



CLADOCEKA. 



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. 



Dapbnia pulex (Linn.). 



Jardiuii, Baird. 



Sida cryptallina (Miiller). 

 Acaiitholeberisciirvirostris(ilf«//.). 

 Macrothrix rosea (Jurine). 

 I^athonura rectirostris (3Iuller). 

 Bosniina longispina, Lei/diy. 

 Polyphemus pediculus {Linn.). 

 Drepanothrix hamata, G. O. Sars. 

 Eurycercus lamellatus (Miiller). 

 LjTiceiis quadrangularis, Miiller. 

 harpje (Beard). 



Lynceus macrourus, Miiller. 



elongatus ( G. O. Sars). 



costatus (G. O. Sars). 



giittatus (G. O. Sars). 



truncatus, Miiller. 



exiguus, Lilljehorg. 



barbatus, Brady*. 



nanus (Baird). 



testudinarius, Fischer. 



sphgericus, Miiller. 



globosus (Baird). 



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

 tratus were found in Lough ]\Ioher, near Westport, and in a 

 burn near the same place Lynceus (n'yonellu.Sj L. iincinatus, 

 and Monosj)ihcs tenuirostris. The specimens which we refer 

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

 occurs at Belsay, in the couut}^ 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 otlier little-known Ihitish species enumerated in the present 

 paper will bo found described and tigured in * A Monograph of the British 

 Entomostraca belonging to the Families Bosmiuidjc, Macrothricidae, and 

 Lvnceidoe,' by the Rev. A. M. Norman, MA., and (ieorgc S. Bradv, 

 C'M.Z.S. London : Williams & Norgate, lf<07. 



