OF THE ANTWERP CRAG. 381 
Family CYPRID. 
Genus Paracypris, G. O. Sars. 
Shell smooth, compact, higher in front than behind. Upper antenne 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 sete. One eye. 
PaRacyPris POLITA, Sars. (Plate LXIII. figs. 5 a-6 d.) 
Paracypris polita, G. O. Sars, Oversigt af Norges Marine Ostracoder, p. 12 (1865). 
Paracypris polita, Brady, Monograph of Recent British Ostracoda, p. 378, pl. xxvii. figs. 1-4, and 
pl. xxxvii. 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. 
Surface smooth. Length 3'5 inch (1 millimetre). 
One or two specimens only were found in the Pectunculus and Panopea-menardi beds 
of the “Sables inférieurs.” 
In the living state the species occurs, though not very commonly, in the North Sea 
off 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 Pontocypris, 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 faba closely approaches P. mytiloides (Norman). 
Pontocypris propinqua closely approaches P. angustata, Brady, and P. trigonella, Sars. 
Cythere belgica closely approaches C. plicatula, Reuss. 
Cythere cicatricosa closely approaches C. convexa, Baird. 
Cythere macropora closely approaches C. lactea, Brady. 
Cytheridea cypridioides closely approaches C. zetlundica, Brady. 
Lowoconcha variolata closely approaches L. alata, Brady. 
Cytherura broeckiana closely approaches C. fulva, Brady and Robertson. 
Cytherideis lithodomoides closely approaches Cytheridea elongata, Brady. 
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