224 Mr.G.S. Brady on Marine Ostracoda from Tenedos. 
Cytherura acris, nov. sp. (Plate XV. figs. 3-4.) 
Carapace of the (male ?), 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 ACTOBS the valve, forming a 
sharply cut declivity. Length ;5 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 (?) egeus, 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 simuated 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 5 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 5 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 (?) egeus, seen from left side. 
Fig. 4. The same, seen from above. 
