OF THE ANTWERP CEAG. 381 



Family CYPRID^. 



Genus Paeactpris, G. 0. Sars. 



Shell smooth, compact, higher in front than behind. Upper antennas shortly seti- 

 ferous, lower strongly clawed. Second maxilla having a branchial appendage, palp 

 elongated, conical, and inarticulate. Last pair of feet like the first, and ending in a 

 long curved claw. Postabdominal rami large, ending in two strong curved claws and 

 a short seta ; on the posterior margin two long setae. One eye. 



Paracypeis polita, Sars. (Plate LXIII. figs. 5 «-5 d.) 



Paracypris polita, G. O. Sars, Oversigt af Norges Marine Ostracoder, p. 12 (1865). 



Paracypris polita, Brady, Monograph of Recent British Ostracoda, p. 378, pi. xxvii. figs. 1-4, and 



pi. xxsviii. fig. 2 (1868). 

 Paracypris polita, Brady, Crosskey, and Robertson, Monograph of the Post-tertiary Entomostraca 



of Scotland, &c., p. 131, plate xv. figs. 9, 10 (1874). 



Carapace, as seen from the side, elongated, siliquose or subtriangular, highest in front 

 of the middle ; height equal to rather more than one third of the length ; anterior 

 margin evenly rounded, posterior sharply attenuated ; dorsal margin well arched, sloping 

 steeply behind, ventral margin more or less sinuated in the middle. Seen from above, 

 the outline is compressed, oblong, tapering evenly to the extremities ; greatest width 

 situated near the middle and equal to more than a quarter of the length. The left 

 valve overlaps the right in the middle of the ventral surface. End view broadly ovate. 

 Sui-face smooth. Length -^ inch (1 millimetre). 



One or two specimens only were found in the Pectunculus and PanopcBa-menardi beds 

 of the " Sables inferieurs." 



In the living state the species occurs, though not very commonly, in the North Sea 

 oiF the coasts of Great Britain and Norway. It has been noticed also sparingly as a 

 fossil in the Post-tertiary beds of Norway and Scotland. 



Genus Pontoctpeis, G. O. Sars. 

 Shell thin and fragile, higher in front than behind, elongated, subreniform or sub- 

 certain living species as to make their distinction somewhat doubtful ; the alliances are as follows : — 



Pontocypris faha closely approaches P. mytiloides (Norman). 



Pontocypris 2>roj)inqua closely approaches P. angustata, Brady, and P. triyonella. Sars. 



Cyihere belgica closely approaches C. plicaiula, lleuss. 



Cythere ciaitrieosa closely approaches C convexa, Baird. 



Cyihere macropora closely approaches C. lactea, Brady. 



Cytheridea cypridioides closely approaches C. zeilandica, Brady. 



Loxoconcha variolata closely approaches L. alata, Brady. 



Cytherura hroeckiana closely approaches C.fidva, Brady and Robertson. 



Cytherideis lithodomoides closely approaches Cytheridea elonc/ata, Brady. 



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