of the North Atlantic and of North- Western Europe. 727 



Norfolk Broads (Brady & Robertson). River Ouse, near Lynn, Norfolk ; Fulwell 

 Cemetery, near Sunderland (G. S. Brady). 



Distribution. — Rivers Maas and Scheldt in Holland (G. S. Brady). Norway 

 (G. 0. Sars). 



Fossil. — Fluviatile clays, Hornsea, Yorkshire, and Branston Fen. 



3. Pionocypris picta (Straus). 



Genus Cyprois, Zenker. 



Cyprois marginata (Straus). 



1821. Cypris marginata, . . . Straus, H. E,, " M^moire sur les Cypris M^m. 



du Mus.," vol. vii., p. 59, pi. i., figs. 20-22. 



1889. Cyprois flav a, .... Beady & Norman,? " Monograph Ostracoda," i., 



p. 97, pi. viii., figs. 18, 19; pi. xii., figs. 

 13-21, 38. 



1890. ,, marginata, . . Sars, G. 0., " Oversigt af Norges Crustaceer," 



II., p. 54. 



We think that Professor Sars has rightly referred this to the hitherto uniden- 

 tified C. marginata of Straus. 



Genus Ilyocypris, Brady & Norman. 



Professor G. 0. Sars is perhaps right in regarding two species as having been 

 confounded by authors under the name Cypris gibba, Ramdohr. The differences 

 in the two forms had long been a matter of perplexity to us. 



1. Ilyocypris gibba (Ramdohr). 



(PI. Lxviii., figs. 20, 21.) 



1868. Cypris gibba, . . . Brady, " Mon. Brit. Ostrac," partim, pl. xxiv., 



fig. 54 ; pl. xxxvi., fig. 2. 



1889. Ilyocypris gibba, . . Brady & Norman, " Monog. Marine & Freshwater 



Ostracoda," p. 107 partim, pl. xxii., figs. 1-5. 



1890. ,, ,, . . Sars, G. 0., "Oversigt af Norges Crustaceer: ii. 



Branch. Ostrac. Cirrip.," p. 58. 



1891. ,, ,, . . Vavra, " Monog. der Ostracoden Bohmens," p. 57, 



fig. 17. 

 1894. ,, ,, . . Var. tuberculata. Kertesz, K., " Daten zur Os- 



tracoden-Fauna der Umgegand Szeghalom's. 

 Termeszetrajzi Fiizetek," 1893 (1894), p. 169, 

 pl. vi., figs. 1—12. 



612 



