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



Catfield, Norfolk. Although figured and described by Brady & 

 Norman (57) it has not been previously recorded as British. 



S. chevreuxii Sars [Sars (67)]. 



Professor G. S. Brady informs me that he took this species 

 many years ago in a pond at Lyndhurst, in the New Forest, but 

 that it has hitherto remained unrecorded as British. 



Herpetocypris Brady & Norman. 

 H. reptans (Baird). 



Candona reptans and C. similis (young) Baird (1) ; Cyp'is 

 reptans Brady (56). 

 A very common species in most parts of the country. 



H. strigata (0. F. Miiller). 



Not very frequently met with, and not yet recorded from 

 Ireland and Wales. 



H. tumefacta (Brady & Robertson). 



Cypris tumefacta Brady & Robertson (58). 

 Somewhat commoner than the foregoing perhaps, but still 

 rather rare. 



Ilyodromus Sars. 

 I. olivaceus (Brady k Norman). 



Erpetocypris olivaceus Brady & Norman (57) 1889. 

 Only recorded from Duddingston, Kinghorn, Black, and Forfar 

 Lochs in Scotland, and from the River Lathkill in Derbyshire. 



I. robertsoni (Brady & Norman). 



Eo'petocypris robertsoni Brady & Norman (57) 1889. 

 Mr. T. Scott (20) has found this in several localities in Scot- 

 land, and Mr. D. Robertson also collected it near Peebles and 

 in Skye, but it has not been seen in other parts of the British 

 Isles. 



Prionocypris Brady & Norman. 

 P. serrata (Norman). 



Cypris serrata Brady (56) ; Erpetocypris serrata Brady & 

 Norman (57) 1889. 

 Apparently a rather rare species, and confined to England so 

 far as our present records go. In addition to the localities noted 

 by Brady & Norman, I have collected it from the East London 

 Waterworks reservoirs at Walthamstow, and from Purneet, 

 both in Essex. 



