Variations Among ScyphomeduscB. 



557 



6 



>Fig. 4. Hexamerous ephyra, one lobe of which is compound. 

 Fig. 5. Hexamerous ephyra, with two-Iobed mouth, and two gastric lobes. 

 Fig. 6. Ephyra with small supernumerary rhopalium, several examples of which were found. 

 Fig. 7. Ephyra with an adradial rhopalium, and one of the normal lobes devoid of an organ, 

 perhaps due to injury. 



