OF THE ANTWEEP CEAG. 387 



oblong-ovate, widest behind. Surface of the shell minutely and rather closely punctate, 

 marked by two distinct but slender ribs, one of which crosses the centre of the valve 

 somewhat obliquely in a longitudinal direction ; the other lies near the ventral border, 

 and curves upward behind to join the central rib. Length ^o ^^ch (0'85 millim.). 



This is not very unlike a form described by Prof. Rupert Jones under the specific 

 name " sphcerulolineata ;" but as in some points it does not agree with the description, 

 especially as regards the central tubercle and the " beaded " character of the ridges, I 

 have thought it better to assign it here a new name. Only one or two specimens were 

 found in the " Sables superieurs." 



Cythere plicatula (Reuss). (Plate LXIV. figs. 6 «, 6 h.) 



Cypridina plicatula , E,euss, " Die fossilen Entomostr." &c., Haidinger's Abhandl. 1850^ p. 44, pi. x. 



fig. 2.3, a, b. 

 Cythere plicatula, Bosquet, Entom. fossil, des terr. Tertiair. de la France, &c. p. 92, pi. x. fig. 23 a, b. 

 ? Cythere retifastigiata, Jones, Tertiary Entomostraca, p. 36, pi. 3. fig. 7. 

 Cythere plicatula, Egger, op. cit. p. 38, pi. 5. figs. 6, 7, 8; Brady, " On new or imperfectly known 



Species of Marine Ostracoda," Trans. Zool. Soc. London, 1865, vol. v. p. 374, pi. Ix. fig. 1 a-c. 



Carapace, as seen from the side, oblong, subquadrangular, higher in front than behind ; 

 height equal to half the length ; anterior extremity rounded, posterior scarcely rounded, 

 and armed below the middle with three or four more or less prominent teeth ; dorsal 

 and ventral margins nearly straight, the former slightly elevated over the anterior 

 hinge-joint. Outline, as seen from above, oblong-ovate. The valves are marked by 

 three more or less distinct longitudinal ridges, the rest of the surface being covered 

 with rather coarse angular punctations. Length yj inch (0-75 millim.). 



C. plicatula has been found in several localities, but is apparently not very common 

 in any of them. Dr. Reuss records its occurrence in several localities in Austria, 

 Bohemia, and Galicia ; Dr. Egger in Germany, and M. Bosquet in the Miocene of the 

 South of France, as well as in the " terrain subapennin superieur de Perpignan." If 

 my identification of it with the C. retifastigiata of Rupert Jones be correct, it has also 

 been noticed sparingly in the Suffolk Crag (" Coralline " Crag) of England. The one 

 specimen which I here figure and describe was found in the bed of " Isocardium cor " 

 (Sables moyens d'Anvers). The species occurs at the present day living in the Levant 

 and Eastern Mediterranean. 



Cythere cicatricosa (Reuss). (Plate LXIV. figs. 3 a-3 d.) 

 Cypridina cicatricosa, Reuss, Die fossil. Entom. osterreieli. Tertiar-Beckens, p. 27, pi. ix. fig. 21 



a, b (1849). 

 Cythere cicatricosa, Bosquet, Entom. foss. terr. Tertiair. France, p. 76, pi. iii. fig. 13 (1852) ; Brady, 



Crosskey, and Robertson, Post-tertiary Entom. of Scotland, &c., p. 151, pi. xiv. figs. 7-10. 

 Cythere arborescens, Brady, Ann. & Mag. Nat. Hist. vol. xvi. pi. ix. figs. 5-8 (1865). 

 VOL. X. — PART VIII. No. 2. — August 1st, 1878. 3 G 



