Variations Among Scyphomedusce. 



553 



Of the first series a total of 1512 specimens were examined. 

 Of this number 398 or 26 per cent showed variations in some one 

 or more of the organs. Of specimens having less than the normal 

 number of marginal organs there were but 19, or 1.25 per cent. 

 Of those having more than the normal number of these organs 

 there were 379, or 25 per cent. Details concerning these data 

 are given in tabulated form in the following tables. 



Table I. — Showing Correlations of Marginal Lobes and Rbopalia. 



RHOPALIA. 



Table I presents in graphic form the correlations existing 

 between the marginal lobes and the rhopalia. In the vertical 

 column at the left are given the number of marginal lobes rang- 

 ing from 5 to 14, the smallest and largest number respectively 

 found in any specimen. In the horizontal column at the top are 



