FAUNISTIC REGIONS 



255 



or more regions ; for example, a large number of the 

 common marine animals of the British Isles are to be 

 found in the Mediterranean, often at increased depths. 



FIG. 182. MUNIDA, A GALATHEID ("BLAKE"). 



A more detailed subdivision of the seas, on much the 

 same lines as that of Ortmann, but including oceanic 

 bottom areas, and suitable also for planktonic areas, has 



