224 Mr. G. S. Brady on Marine Ostracoda from Tenedos. 



Cytherura acriSj nov. sp. (Plate XV. figs. 3-4.) 



Carapace of the {malel)^ as seen from the side, oblong, sub- 

 clavate, nearly equal in height throughout ; height scarcely 

 equal to half the length : anterior extremity rounded, pos- 

 terior produced in the middle into a long tapering process : 

 superior margin nearly straight ; inferior also straight or 

 very slightly sinuated, produced posteriorly into a sharp 

 spine. Seen from above, subhexagonal, oblong, with parallel 

 sides, obtuse in front, sharply mucronate behind ; width 

 equal to the height. Valves obscurely reticulated, marked 

 with two subparallel longitudinal ridges, the lower of which 

 terminates behind, on the ventral surface, in a sharp spine, 

 and thence runs rectangularly across the valve, forming a 

 sharply cut declivity. Length j'^ inch. 



The gathering contains also several specimens smaller and 

 more tumid than those here described, which are probably the 

 female of the same species. 



Sclerochilus (?) cegceus^ nov. sp. (Plate XIV. figs. 3, 4.) 



Carapace, seen from the side, elongate, siliquose, highest in 

 the middle ; greatest height equal to less than half the 

 length ; extremities narrowly rounded, the posterior almost 

 angular : superior margin boldly arched, sloping almost in 

 a straight line to the front, but with a more distinct curve 

 backwards ; inferior sinuated in front of the middle, curving 

 upwards behind. Outline, as seen from above, ovate, 

 widest in the middle, extremities equally and subacutely 

 pointed ; width equal to fully one-third of the length. Sur- 

 face smooth, white, with clouded patches. Length -^-^ inch. 



Paradoxostoma (?) reniforme^ nov. sp. (Plate XV. figs. 1, 2.) 



Carapace, seen from the side, elongate, reniform, nearly equal 

 in height throughout ; height much less than one-half the 

 length ; extremities evenly rounded : superior margin gently 

 arcuate, inferior sinuated in the middle. Seen from above, 

 compressed, ovate, acutely pointed in front, subacutely be- 

 hind; width equal to scarcely one-third of the length. 

 Surface smooth ; colour whitish, marked with spots of white 

 opacity. Length -^-^ inch. 



EXPLANATION OF THE PLATES. 



Plate XIV. 



Fig. 1. Pontocypris intermedia, seen from left side. 

 Fig. 2. The same, seen from above. 

 Fig. 3. Sclerochilus (?) (egceus, seen from left side. 

 Fig, 4. The same, seen from above. 



