BRITISH FRESH- WATER ENTOMOSTRACA. 33 



Cypridopsis* Brady. 



C. vidua (0. F. Miiller). 



Cypris vidua and C. sella Baird (]). 



Pionocypris vidua Brady & Norman (57) 1896, Scott (20), 

 Scourfield (29). 

 One of the commonest of the British Ostracoda. 



C. obesa Brady & Robertson. 



Pionocypris obesa Brady & Norman (57) 1896. 

 Not yet recorded from Wales or Scotland, but this may be 

 simply due to the fact that it is not usually regarded as anything 

 more than a variety of C. vidua. 



Cypridopsella* Kaufmann. 



C. aculeata (Costa). 



Cypridopsis aculeata Brady (oQ), Brady & Norman (57). 

 Not found as a rule far away from slightly brackish water. 



C. villosa (Jurine). 



Cypris westwoodii and ? C. elongata Baird (1). 

 Cypridopsis villosa Brady (oQ), Brady & Norman (57). 



^Yidely distributed, but not a very common species. 



C. newtoni (Brady & Robertson). 



Cypridopsis newtoni Brady & Robertson (58), Brady <k. 

 Norman (57), Scott (20). 

 One of the rarer British species. 



C. variegata (Brady & Norman). 



Cypridopsis variegata Brady & Norman (57). 

 Also a rather rare species, though widely distributed. Since 

 the " Entomostraca of Epping Forest" (29) was issued, I have 

 found specimens of this species in Higham Park Lake. 



* Notwithstanding the opinion expressed by Brady & Norman in the 

 Appendix to Part II. of their monograph (57), there seems no sufficient 

 reason for removing C. vidua and its nearest allies from the genus 

 Cypridopsis as it was originally described by Brady in 1868, and these 

 authors themselves give C. vidua as the type species of this genus in the 

 first part of their work. It follows, therefore, that the name Pionocypris 

 must be dropped so far as our British species are concerned, although it 

 will still hold for certain Australian forms. As, however, the C. aculeata — 

 C. villosa group seems to form a distinct genus, the name Cypridopsella, 

 proposed by Kaufmann, and now ad >pted by Sars and other authors, has 

 been followed here. 



Journ. Q. M 0., Series II.— No. 54. 3 



