146 POST-TERTIARY SlNTOMOSTRACA. 



6. Cythere cribrosa, 7iov. sj). Plate X, figs. 5 — 7. 



Carapace compressed, oblong ; seen laterally, rather higher in front than behind ; 

 greatest height equal to half the length ; anterior extremity evenly, posterior obliquely, 

 rounded and obsoletely angular about the middle ; superior margin gently arched, 

 highest in front of the middle, and terminating behind in an obtuse angle; inferior 

 almost straight. Seen from above, compressed, ovate ; anterior extremity subacuminate, 

 posterior narrowly rounded, Avidth less than the height ; end view subcircular. Surface 

 of the valves covered with rather closely reticulated furrows which assume a concentric 

 arrangement toward the margins. 

 Length ^th of an inch. 



This is a very pretty and distinct species, its nearest relative being, perhaps, C. 

 Robertsoni, Brady (see ' Ann. and Mag. Nat. Hist.,' July, 1868), from which it differs 

 chiefly in its somewhat greater size and more compressed and elongated, as well as less 

 angular, form. 



Fossil. — England : Bridlington. 



7. Cythere crispata, Brady. Plate X, figs. 52, 53; and Plate XIII, figs. 12, 13. 



1865. Cythere cicatricosa, G. O. Sars. Oversigt af Norges marine Ostracoder, 



p. 33. 

 1868. Ctthere badia (in part), Brady. Monog. Rec. Brit. Ostrac, p. 399 (not 



figures). (Not C. hadia of Norman.) 

 1868. — — Brady. Les Fonds de la Mer, vol. i, p. 89. 



1868. Cythere crispata, Brady. Ann. and Mag. Nat. Hist., ser. iv, vol. ii, p. 221, 



pi. xiv, figs, 14, 15. 



1869. — CICATRICOSA, J5rac??/ and i2o5er<«o?i. Ann. and Mag. Nat. Hist., ser. 4, 



vol. iii, p. 369, pi. .\ix, figs. 

 13, 14. 



Carapace, as seen from the side, subreniform, higher in front than behind ; greatest 

 height in front of the middle, equal to more than half the length ; anterior extremity 

 rounded, and often slightly crenulated below the middle; posterior truncate, with 

 slightly rounded angles ; superior margin gently arched, sloping from before backwards ; 

 supero-posteal angle somewhat produced ; inferior margin nearly straight ; seen from 

 above the outline is compressed, almost clavate, narrowly rounded in front and truncate 

 behind, with nearly parallel sides, which are sharply constricted near the posterior 

 extremity ; width considerably less than half the leno;th. Surface of the shell marked 



