221 THE FRESH-WATER ENTOMOSTRACA OF ABERDEENSHIRE 
this name in its recent restricted application) has been 
noticed, while Herpetocypris and Candona are represented 
by only one species each. As is well known, the distri- 
bution of the Ostracoda is even more erratic than that of 
the Copepoda or Cladocera ; and therefore, though apparently 
scarce at one time, at another they may be more or less 
common. This uncertainty in the distribution of these 
organisms, though at times somewhat disappointing, has 
one advantage: it tends to keep alive the interest in their 
study, as there is always the possibility that the results 
of the next gathering may be better than the last one. 
