FLORIDAN BRYOZOA. 77 



As will be seen from this table, the deeper regions, generally, contain either very old species or those 

 with a very great geographical distribution, principally, with arctic or antarctic connection. Some of the spe- 

 cies of the higher regions, common for the Oceans at the both sides of the American continent, without going 

 beyond the tropics, evidently seem to point to a former connection, of a relatively late time, of these two 

 Oceans through any Panaman passage; while other high-sea-species, common for the Carribbean and Australian 

 seas, as well as the Mediterranean or Red-Sea, without going down to the deep regions, seem to point to any 

 littoral connexion along the sequatorial or temperate latitudes. These considerations, however, for being further 

 carried forth, still require a much better knowledge of the Bryozoa of the different geographical regions, than 

 what the science possesses at present. 



