Clare Island Survey — Fresh-water Evtomostraea. 46 5 



exceeds the total yet recorded from Wales. It only falls short of the complete 

 Irish list by about twenty-eight species. 1 



In addition to the species recorded in this paper for the first time for 

 Ireland, the Mayo-Galway list comprises quite a number of forms which have 

 not hitherto been seen in other parts of Ireland, but little or no importance 

 can be attached to this at present, owing to the fragmentary nature of the 

 records outside the two counties named. 2 It contains three species, Diap- 

 tomus sancti-patricii, Canthocamptus praegeri, n. sp., and Cypi'idopsella picta 

 (the first-named, however, only doubtfully distinct from D. laciniatus), which 

 have not been found elsewhere in the British Isles. It also includes two species, 

 Alona rectangula and Candona stagnalis (or three species if we consider 

 Diaptomus sancti-patricii as only a variety of D. laciniatus) and one variety, 

 Diaphanosoma brachyurum var. nasuta, which have also been found in Scotland, 

 but nowhere else in the British Isles. With the English list it has five species 

 in common which have not yet been found in Scotland, viz. Acropcrus 

 angustatus, Cyclops oithonoides, C. rubellus, Cypridop sella obesa, and Metacypris 

 cordata. On the other hand, the Mayo-Galway list, as well as the complete 

 Irish list, contains no representative of the Baphnia magna group, nor of the 

 genera Moina and Moraria, and naturally a number of individual species from 

 several other genera are also absent. 



1 In view of the subsequent remarks on distribution the mimes of these additional Irish species 

 may be usefully given here : — 



Cladocera. Ostsacoda. 



Daphnia cucullata. Cypris pubera. 



Ceriodapbina laticaudata. virens. 



Macrothrix laticornis. affinis. 



Alona tenuicaudis. bispinosa. 



Leydigia acanthoeercoides. Herpetocypris tumefacta. 



Pleuroxus laevis. Ilyodromas olivaceus. 



aduncus. robertsoni. 



Anchistropus emarginatus. Cypridopsella variegata. 



Bythotrephes cederstrbmii. Candona angulata. 



elongata. 



Copepoda. laetea. 



Diaptomus castor. * compressa: 



Cyclops leuckarti. fragilis. 



phaleratus. Cytheridea lacustris. 

 aequoreus. 

 Argulus foliaceus. 



2 It is very much to be desired that good lists of Entomostiaca from various districts in Ireland 

 should be obtained in the near future. I would suggest that attention should be paid particularly to 

 the north-west, south-west, and east or south-east. 



* Note. — The records of Diaptomus ynteiloides by W. and U.S. West (24) are probably incorrect, 

 as this species as defined by Schmeil has never been seen in the British Isles. 



