558 



Chas. W. Hargitt. 

 Table III. 



Each of these rhopaha occupied a single octant of the ephyra 

 margin, and differed but Httle in size from the others. It should 

 be stated that each was found on a different specimen. 



In two specimens were found a very rare feature among these 

 varied rhopalial phenomena, namely, the presence of a rhopalium 

 in an iterobular, or adradial position, as shown in Figs. 6, 7. 

 One of such cases I also discovered in connection with the study 

 of the development of Cyanea. Here we probably have the 

 origin of the condition which eventuates in the equally rare occur- 

 rence of an adradial rhopalium in the adult medusa, cases of 

 which will be considered in a later connection. 



Oral and Gastric Organs. 



As compared with the marginal system that of the vegetative 

 shows comparatively little variation, at least in the ephyra stage, 

 though the present data are far from complete. In the first place 



