30 D. J. SCOURFIELD, SYNOPSIS OF THE KNOWN SPECIES OF 



OSTRACODA. 



Cyprididae. 



Cypria Zenker. 

 C. exsculpta (Fischer). 



Cypris striolata Brady (56). 

 Not a very common species, although widely distributed. 



C. ophthalmica (Jurine). 



Cypris compressa Baird (1), Brady (56). 

 A very common species. The " lacustris" form probably 

 occurs in this country, although it has not been separately 

 recorded. 



Cyclocypris Brady & Norman. 

 C. globosa (Sars). 



Cypris cinerea Brady (56). 

 Not yet seen in the south and east of England or in Wales. 



C. serena (Koch). 



Cypris laevis Brady (56). 

 Occurs frequently in all parts of the country. 



C. laevis (0. F. Miiller). 



Cypris minuta Baird (1) ; Cypris ovum Brady (56). 

 Also common throughout the British Isles. 



Scottia Brady & Norman. 

 S. browniana (Jones). 



Only found on the shores of Loch Fadd in the Island of Bute. 



Cypris O. F. Miiller. 

 C. fuscata (Jurine). 



C.fusca Baird (1), Brady (56). 

 A very common species in ponds and small pieces of water, but 

 not in lakes. 



C. incongruens Ramdohr. 

 C. aurantia Baird (1). 

 Somewhat rare, although widely distributed. It is said by 

 Brady & Norman (57) to be most common in slightly brackish 

 water, but it is by no means characteristic of such situations. 



C. pubera 0. F. Miiller. 



C. cuneata Baird (1) ; C . punctillata Brady (56). 

 A rare species. The only record I have of it from the south 

 and east of England is a shallow pond at Esher, Surrey. 



