254 



ANIMALS OF THE SEA FLOOR 



The definition of these regions must not be taken 

 as implying that there is any strict demarcation 



FlG. 179. ROCINELA, AN 



ISOPOD (" BLAKE"). 



FIG. 1 80. EPIMERIA, AN 

 AMPHIPOD ("BLAKE"). 



FIG. 181. CATAPAGURUS, A HERMIT-CRAB, ITS POSTERIOR END IN 

 A SHELL, ON WHICH LIVES A COLONY OF ANEMONES (" BLAKE "). 



between their faunae. There is naturally a great deal of 

 overlapping, and very many species are common to two 



