252 



HYDROID POLYPES 



LESS. 



FIG. 58. Diphyes campamilata. 



A, the entire colony, natural size, showing stem (a) bearing groups 01 

 zooids (e) and two swimming bells (m, m], the apertures of which ai-e 

 marked o. 



B, one of the groups of zooids marked e in A, showing common stem 

 (a), hydranth (), medusoid (g), bract (/), and branched tentacle or 

 grappling line (?'). (From Gegenbaur.) 



