262 Malcomson. — Recent Ostracoda of Belfast Lough. 
the deeper water, although the first specimen was in shore sand from 
Portrush, where it had probably been washed up. Dr. Brady informs 
me that my specimens differ from the types obtained by him from t e 
Gulf of St. Lawrence, in being rather stouter, less depressed in front, 
less distinctly punctated, rather smaller, and in haying the ventral over- 
lap of the valves in the opposite direction. 
Paradoxostoma truncatum, n. sp. (Plate xxv., figs. About a 
dozen specimens of this species have been found in a single locality off 
Coalpit Bay, hut it has not been seen anywhere else. Carapace, as seen 
from the side, compressed, irregularly ovate, greatest height m the 
middle, and equal to rather more than half the length. Anterior margin 
nearly straight, and sloping upwards almost at right angles to the ante- 
rior part of the dorsal margin; posterior extremity evenly rounded. 
Superior margin well arched, sloping somewhat steeply m front ; inferior 
sinuated in front of the middle. Outline, as seen from above ovate 
extremities pointed, widest in the middle ; greatest width equal to rather 
more than one-third the length. Yalves pellucid, white, or slightly 
ochreous. Length, l-60th inch. 
Cytherella Scotica, Brady. Only, a single yalve of this species has been 
