BRANCH CCELENTERATA : THE POLYPS, ETC. ior 



viduals, locomotor individuals, sense individuals, and 

 reproductive individuals. The modifications of the various 

 kinds of individuals are more extreme than in the case of 

 the various kinds of individuals composing a bee-com- 

 munity, for example, but the holding together or fusing 

 of all into one body or corporation is a condition which 

 makes this greater modification necessary and not un- 

 expected. And there is no difficulty in seeing that each 

 of these parts is really, structurally considered, a modified 

 polyp or medusa. 



The large jellyfishes, etc. (Scyphozoa). To the class 

 Scyphozoa belong most of the common large jellyfishes. 



FIG. 15. A jellyfish or medusa, Gonionema vertens, eating two small 

 fishes. (From specimen from Atlantic Coast.) 



When one walks along the sea-beach soon after a storm 

 one may find many shapeless masses of a clear jelly-like 



