SALT-MARSHES OF NORTHUMBERLAND AND DURHAM. 125 



in this country in the following localities : — Brackish ditches at 

 Gravesend (Professor T. Eupert Jones), Sutton Decoy, Suffolk 

 (Mr, E. C Davison), Cowpen Marsh, near Stockton (Rev. A. 

 M. Norman), Hylton Dene and Monkwearmouth Colliery pond 

 (a. S. B.). 



Family. CYTHERID^. 

 GEmrs. CYTHERE, Mailer. 



Cythere castanea, G. 0. Sars. 



Cythere castanea, G. 0. Sars. Oversigt af Norges Marine Os- 

 tracoder, p. 32, Brady, Monograph of recent British Ostra- 

 coda, p. 398, Plate XXVIIL, fig. 27 ; and Plate XXXVIII., 

 fig. 6, 



Occurs pretty plentifully in most of our salt-marshes, I have 

 found it at Hylton Dene, Jarrow Slake, and at the mouths of the 

 Seaton Burn, Wansbeck, Aln, and Tweed. 



Genus. CYTHERIDEA, Bosquet. 



Cytheridea littoralis, {Brady). 



Cyprideis torosa. Brady, Trans. Tyneside Nat. Field Club, Vol. 

 VI., p. 108, Plate III., figs. 11-23, G. 0. Sars, Oversigt 

 af Norges marine Ostracoder, p. 51. 



Cytheridea torosa, Brady. Monograph of the recent British 

 Ostracoda, p. 425, Plate XXVIII., figs. 7-12; and Plate 

 XXXIX,, fig. 5. 



There seems to be no valid distinction between the genus Cy- 

 prideis, proposed by Prof. T, Rupert Jones, and the previously 

 established genus Cytheridea, Bosquet. C. littoralis occurs often 

 in very great abundance, and almost always in brackish water. 

 The following are the localities where I have taken it : — Jarrow 

 Slake, Seaton Sluice, mouths of the Wansbeck and Coquet ; and 



