222 Mr. G.S. Brady on Marine Ostracoda from Tenedos. 
Cythere favoides, nov. sp. (Plate XV. figs. 5-7.) 
Carapace of the female, as seen from the side, subquadrangular, 
higher in front than behind; greatest height equal to rather 
more than half the length: anterior extremity well rounded 
and slightly dentate below the middle; posterior produced 
below the middle into a subsquamous flange or bordering 
process, slightly emarginate above the middle: superior 
margin a little elevated over the eyes, thence sloping gently 
backwards in an almost straight line; inferior gently si- 
nuated. Seen from above, ovate, widest behind the middle; 
extremities obtusely mucronate; greatest width equal to 
half the length. Shell of the male much more elongated, 
the dorsal margin slightly sinuated; posterior extremity 
not so deeply excavated above the middle. Surface of the 
valves marked with a beautiful hexagonally reticulated 
pattern of delicate raised ridges, and towards the anterior 
extremity with a broad border, which is crossed by numerous 
radiating hair-like lines. Length of female 34; inch. 
Cythere Speyert, nov. sp. (Plate XV. figs. 8-11.) 
Shell of the female tumid. Seen from the side, broadly subreni- 
form, highest in the middle; greatest height equal to nearly 
two-thirds of the length: anterior extremity rounded, pos- 
terior produced into a sort of beak below the middle, and 
excavated above : superior margin boldly arched, highest in 
the middle ; inferior slightly sinuated in front of the middle, 
bending upwards behind. Seen from above, ovate, widest 
in the middle, broadly mucronate behind, obtusely pointed 
in front. Shell of the male (?) larger (fig. 8), the dorsal 
margin less conspicuously arched, the posterior not so pro- 
minently beaked. Surface of the valves marked with close 
and coarsely impressed round puncta; the ventral margin 
(of each valve) bearing towards the posterior extremity a 
single, sharp, downward-pointing spine. Length of female 
zy Inch. 
This species is very similar in general appearance to the 
British C. convexa, and differs chiefly in being very much 
more tumid: the peculiar ventral spine is also sometimes pre- 
sent in the British species. 
Cythere dissimilis, noy. sp. (Plate XV. figs. 12 & 13.) 
Valves, as seen from the side, subquadrate, highest in front of 
the middle; greatest height equal to rather more than half 
the length: anterior extremity broadly and somewhat 
obliquely rounded, posterior oblique, deeply excavated, and 
