Clare Island Survey — Fresh-water Entomostraca. 46 15 



indeed be anticipated from the presence of this species. New to 

 Ireland. 



One specimen, agreeing in all other respects with the typical form of 

 the species, exhibited the remarkable modification of the furca (PI. I, 

 fig. 10) which has been already referred to in connexion with the 

 question of variations. 



Nitocra spinipes Boeck ( = Canthocamptus palustris Brady, var. elougutus 

 Scott). — This species, which must, like the foregoing, be regarded rather 

 as a brackish than a fresh-water form, was only taken in little pools on 

 the rocks not far above high-water mark on the north-east coast of Clare 

 Island. The water in these pools was turbid and noticeably green, due 

 to the presence of great numbers of various kinds of microscopic algae. 

 Among the latter, Professor G. S. West informs me, were the two very 

 interesting species, BracMomonas submarina and Oocystis submarina. 

 New to Ireland. 



Cyclocypris serena (Koch). — The specimens from one of the Clare Island 

 localities (Loughanaphuca) recorded under this name seemed to me to be 

 somewhat peculiar. To the naked eye they were almost black and 

 uniformly coloured, but showed under the microscope brown patches 

 similar to those in Cyprirt ophthahiica, only much darker. They were not 

 so tumid as in typical C. serena. Dr. Vavra, however, considers them as 

 belonging to this species. 



Cypris ? obliqua Brady. — The specimens from two ponds in the south-western 

 portion of Clare Island were not quite adult, but appeared to belong to 

 C. obliqua. If this determination is correct, they represent a new record 

 for Ireland. 



Cypridopsis vidua (0. F. M.). — The specimens from Clare Island and Achill 

 were not so tumid nor so evidently marked with colour-bands as is 

 usually the case in this species. On the other hand, they showed 

 much more pronounced pitting of the shell. Upon reference to Dr. Vavra, 

 however, he said that they exhibited the typical anatomical details of 

 C. vidua. 



Limnicythere sancti-patricii B. & Pi. — Eecorded by Brady and Robertson from 

 L. Moher (9), but not seen during the progress of the survey. 



Cytheridea torosa (Jones). — Eecorded by Norman from Newport and West- 

 port (20), but not seen during the progress of the survey. 



