1212 
which it appears that it must be classed with the Cytheridea genus 
and which have reference to the hingement and the way in which 
the valves are connected with each other, it has still the following 
qualities in common with it. The height of the adult specimens is 
almost equally large over the whole length, whereas with the young 
ones it is larger in front than at the back. Towards the hind part 
the width of the carapaces augments, so that, viewed from above, 
they are also more or less wedge shaped. Moreover both kinds of 
valves possess along the under part of the anterior edge and the 
front part of the ventral edge, short teeth flattened at the posterior 
end and on the under part of the posterior edge conical teeth. This 
Ostracod differs from Cytheridea spinulosa because of the following 
points. The carapaces are smaller and firmer. As a rule the valves 
have pits on the outer surface, but sometimes these are so indistinct, 
that they seem smooth. This is almost always the case with the 
middle part, while round it are found pits which are clearly visible. 
Often the edges of the pits are very much raised, by which the 
surface becomes more or less scaly. A consequence of this is, that 
the valves are flatter in the middle and steeper at the edges. This 
is especially the case with the posterior edge, so that the greatest 
width is almost at the anterior part. 
Then the row of spines, flattened towards the end, extends further 
on the front part of the ventral edge, while the sharp teeth on 
the under part of the posterior edge are more prominent here. In 
these Ostracods the plate-like part is also missing, which the right 
valve of the Cytheridea spinulosa has in the above mentioned place. 
The length of a right valve is 0.46 mm., the height 0.27 mm. 
and the width 0.11 mm. 
8. CYTHEREIS GOUJONI. G. S. Brapy. (Fig. 10, 11). 
1868. Cythere Goujoni. G. S. Brapy, 2, p. 78, t. 10, f. 9, 10. 
1880. 33 5 i 5; PaO; ts 25 ted 
non 1901. ,, 3 J. G. Eeerr, 7, p. 431, t. 6, f. 29. 
1912. Cythereis _,, G. W. Mürrer, 11, p. 342. 
In my material I found that the entire carapaces and the loose 
valves of this Ostracod are by far the most numerous. 
Easily two forms can be distinguished viz. a longer and a shorter 
one. According to Brapy the former is the male, the latter the 
female specimen. With a carapace of a male the length was 0.68 mm., 
the height 0.38 mm. and the width 0.33 mm., while in the case of 
