ENTOMOSTRACA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 583 
Cythere antarctica, new species. (Pl. XIV. figs. 5 and 6.) 
Shell, seen from the side, elongated, highest over the posterior hinge, greatest height 
equal to rather more than half the length ; the dorsal margin slopes steeply backwards 
from the highest point, and more gently towards the front, and with a shallow notch 
near the anterior extremity ; posterior end boldly rounded and somewhat produced 
below ; anterior end truncated above, rounded below, with a small subcentral projection 
separating the upper from the lower portion ; ventral margin incurved and sinuous. 
The shell, seen from above, widest in front, the greatest width equal to rather less than 
half the length ; sides not very boldly rounded, converging gently backwards to the 
sharp-pointed posterior end; anterior extremity blunt and slightly produced. Shell 
surface thickly covered with minute circular pits. Length, ‘7 mm. 
- Habitat.—Scotia Bay, South Orkney Islands; collected June 1903; Station 325, 
Gos 42” S., 44° 38’ 33” W. 
Cythere peregrina, new species. (Pl. XIV. figs. 11 and 12.) 
Shell, seen from the side, oblong, highest behind the middle, greatest height scarcely 
equal to half the length; dorsal margin sloping gently from behind the middle in a 
nearly straight line towards the front, but the hinder slope is shorter and steeper ; 
both ends evenly and not very boldly rounded; ventral margin slightly and evenly 
convex. Shell tumid when seen from above, widest in the middle, width equal to 
half the length ; sides rather boldly arcuate and converging towards both ends; both 
extremities acuminate. Shell covered with numerous and extremely fine lines extend- 
ing longitudinally over its surface. Length about ‘75 mm., but varies to some extent ; 
one or two rather larger specimens reach to about 1 mm. in length. 
Habitat.—Scotia Bay, South Orkneys; collected June 1903; Station 325, 
60° 43’ 42” S, 44° 38’ 33” W. 
Genus Xestoleberis, G. O. Sars, 1865. 
Xestoleberis reniformis, G. 8. Brady. (Pl. XIV. figs. 17 and 18.) 
1907, Xestoleberis reniformis, Brady, National Antarctic Kauped,: Natural History, vols. iii.-v., 
“Ostracoda,” p. 6, pl. i. figs. 4, 5. 
A few specimens—adult and (?) youne—of a Xestoleberis occurred among other Ostra- 
coda collected in Scotia Bay, South Orkneys ; Station 325, 60° 43’ 42” S., 44° 38’ 33” W. 
They so closely resemble the form described by Dr Brapy in his paper on the “ Ostra- 
coda of the English National Antarctic Expedition” that I ascribe them to the same 
species. They differ a little from the description and figures given by Brapy, but the 
peculiar outline of the shell, both when seen from the side and from above, seems to be 
characteristic of the species. Length of specimen represented by the drawings, ‘62 mm, 
