848 
THE VOYAGE OF H.M.S. CHALLENGER. 
which occurred in most of the regions explored, but the greater number of the examples 
grouped under this name consisted only of separate valves, varying largely in form 
and size. The difficulty of dealing with imperfect specimens of shells which possess 
no distinctive character of sculpture or surface ornament is insuperable. 
It may be noted that the affinity of the Kerguelen Ostracoda with the European 
fauna is much closer than that of any other locality investigated by the Challenger. 
