VOL. xvi. (3) FOREST MARBLE OF TARLTON 239 
So far as I have been able to determine them, the 
Ostracoda belong to genera of marine or estuarine types, 
although I am not prepared to assert that fresh-water 
forms may not be found among them, indeed one would 
expect to find a certain proportion of fresh-water species 
intermixed with the marine forms. The Foraminifera 
are of course strictly marine, but the numbers are in- 
significant, moreover the state of preservation is very 
indifferent, and such as one would expect to find under 
the conditions assumed. No Mollusks, Corals or Sponges 
have been found in the clay, and only a very few micro- 
scopic fragments of Asteroids and teeth and spines of 
Fish. 
