384 EB- G. S. BKADT ON THE OSTEACODA 



bar which is received into a furrow of the opposite valve ; the teeth sometimes Granu- 

 late, and sometimes wanting on the left valve. Antennae robust ; superior 5-6-jointed, 

 and bearing on the anterior margin three curved spines ; inferior 4-jointed. Mandibular 

 palp 3-4-jointed, bearing in place of a branchial appendage a tuft of setae. Eyes one 

 or two'. 



? Cythere cribeosa, B., C, & E.. (Plate LXIV. figs. 4 a, 4 b.) 

 Cythere cribrosa, Brady, Crosskey, and Robertson, Monogi-apli of Post-tert. Entom. of Scotland, &c., 

 p. 146, pi. X. figs. 5-7. 



Carapace compressed, oblong, subreniform ; seen from the side, the anterior extremity 

 is evenly rounded, the posterior oblique and ending above in an obtuse angle ; dorsal 

 margin nearly straight, ventral rather deeply sinuated in the middle. Height scarcely 

 equal to half the length. The outline, when seen from above, is evenly compressed, 

 oblong, nearly of equal diameter throughout, the extremities being rather obtuse. The 

 surface of the shell is reticulated, the meshes uniting into obscure longitudinal furrows 

 on the ventral surface. Length ^ inch (0'55 millim.). 



Of rare occurrence in the Trophon- and Isocardium-heds. 



Cythere wooDiAN.'i, Jones. (Plate LXV. figs. 4 a, 4 b.) 

 Cythere woodiana, Jones, Monogr. Tert. Entom. England, p. 29, pi. iii. figs. 2a-2ff. 



Carapace, seen laterally, oblong subquadrangular ; anterior extremity oblique, slightly 

 rounded ; posterior scarcely rounded, almost truncate ; superior margin almost straight, 

 inferior very slightly convex ; height equal to half the length. Seen from above, the 

 outline is oblong-ovate, widest behind the middle. The surface is thickly covered 

 with large rounded or subangular punctations. Length -^ inch (1"3 millim.). 



This is one of the most abundant and characteristic of the Ostracoda of the 

 Pliocene Crag of Suffolk (England). Two detached valves have been found in the 

 " Sables superieurs " of Antwerp, Trojihon-antiquum bed. The lower or Suffolk 

 Crag, in which only the English specimens of C. woodiana have been found, is that 

 known as the " Coralline " Crag, though, as stated by Professor Rupert Jones, that 

 designation is quite inapplicable, the characteristic fossils of the deposit being not 

 Corals or Corallines, but Sponges and Bryozoa (Polyzoa). 



Cythere ellipsoide.\, nov. sp. (Plate LXV. figs. 1 a-1 d.) 



Carapace, seen from the side, subelliptical ; height equal to more than half the length 

 and nearly uniform throughout; extremities rounded; dorsal margin very slightly 

 arched, having a slight projection over each hinge-joint fore and aft; ventral margin 



' In the generic definitions given in this Memoir, I have not thought it desirable to include every anatomical 

 detail, but have been content to give only the more important features. 



