1893.] 



MICROSCOPICAL JOURNAL. 



99 



would see that the iiuh\ichiaHt\- of the colony as a whole is not 

 very prominent, and 'would think of the colony not as an animal 

 but as a colony of animals, each zooid impressing him by its own 

 individuality. But just as in Hydra the individualities of the cells 



are lost in the higher unity of the resultant animal, so in hydroid 

 colonies it is possible to find some in which the entire colony is 

 such a unified whole that the separate zooids sink to the level of 

 organs in the higher individuality of the whole organism. This 

 view is very clearly illustrated by JVanomia, a member of the 



