Variations Among Scyphomedusce. 



57^ 



Fig. II. Single octomere of adult medusa showing entire absence of the interradial canal, and the 

 contiguity of two adradials. 



Fig. 12. Diagram of medusa showing adradial rhopalium at a and lack of perradials in the octo- 

 meres drawn. Very small degenerate gonad in upper left hand pouch. 



Fig. 13. Branched adradial canal at a, and at x the complete blending of the several canals of the 

 segment into one system. 



