ENTOMOSTRACA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 581 
PODOCOPA. 
Fam. Cyprip&. 
Genus Macrocypris, G. 8. Brady, 1868. 
Macrocypris maculata, G. 8. Brady. (Pl. XIV. figs. 1 and 2.) 
1865, Cytherideis maculata, Brady, Trans. Zool. Soc., vol. v. p. 367, pl. vil. fig. 12, a—d. 
1880, Macrocypris maculata, Brady, Ostracoda of the “ Challenger” Exped., p. 44, pl. i. fig. 2, a-d. 
Halitat.—Scotia Bay, South Orkneys; collected April 1903; Station 325, 
60° 43’ 42” S., 44° 38’ 33 W. Several specimens were obtained ; they varied somewhat 
in size. ne of the larger specimens measures 1°5 mm. in length; height rather less 
than half the length, highest in the middle; dorsal margin arcuate, sloping about 
equally towards both ends, but the posterior is rather narrower than the other; lower 
margin slightly concave and sinuate, especially towards the front. Seen from above, 
the shell is elliptical in outline, widest in the middle, width equal to about one-third 
of the length, tapering equally to each end; both ends narrow; colour brownish. 
This species appears to be widely distributed. 
Fam. CyTHERIDA. 
Genus Cythere, O. F. Miller, 1785. 
Cythere inornata, new species. (PI. XIV. figs. 9 and 10.) 
Shell, seen from the side, oblong; height equal to about half the length; dorsal 
margin nearly straight, ventral margin slightly incurved. The posterior extremity 
slopes at first abruptly downwards, then becomes boldly rounded; the anterior end is 
somewhat similar, but is rather more produced, especially below. Seen from above, the 
shell is moderately tumid, widest in the middle, greatest width equal to rather more 
than half the length, sides evenly rounded, but tapering rather more towards the 
anterior end, which is wedge-shaped. Shell surface rough, with numerous small 
circular pits and setiferous papillae between. Length of shell about 1:2 mm. 
Habitat.—Scotia Bay, South Orkneys, June 1903; Station 325, 60° 43’ 42” S., 
22°38 33” W. 
Cythere quadridens, new species. (Pl. XIV. figs. 15 and 16.) 
Shell, seen from the side, oblong, highest in front, the height equal to rather more 
than half the length; anterior end boldly rounded; posterior extremity truncated 
above, slightly produced below the middle, and provided with about four more or less 
distinct tooth-like projections. The dorsal margin shows a slight elevation immediately 
over the anterior hinge, thence it slopes backwards to.the posterior extremity in a 
nearly straight line, where it is abruptly angulated; lower margin slightly excavated 
behind the anterior extremity, and thence converges gently backwards. Seen from 
above, the shell is widest behind the middle, greatest width scarcely equal to half the 
