Variation in Aurelia aurita 



Table IT. 

 Table showing Percentages with an Abnormal number of Tentaculocysts. 



131 



Authority. ..... 



M'Intosh. 



Browne. 



Hargitt. 



Total examined .... 



P.c. with less than the normal \ 

 number of Tentaculocysts . J 



P.c. with more than the normal \ 

 number of Tentaculocysts . J 



10U0 



2-2 



13-8 



2000 



4-5 



157 



2500 



1-96 



22-97 



Total Percentage of Variation . 



16 



20-2 



24-93 



2. Variations in the Number of Reproductive Organs. 



In an adult Aurelia, the most conspicuous organs are undoubtedly those 



connected with the reproductive system. This probably explains the fact 



that, though variation in them is comparatively small, earlier observers have 



paid more attention to these than to the other organic systems. Ballowitz 



(op. cit.) gives a very admirable synopsis, with many illustrations, of the then 



(1898) known facts. 



Table III. 



Showing details of Specimens with an Abnormal number of Gonads. 



No. of 



No. of 



No. of 



No. of Ten- 



Arrangement of Branched 



Spe 



cimens. 



Gonads. 



Oral Lobes. 



taculocysts. 





Canal System. 



CO 

 CO 



a 



1 



2 



2 



4 



j Per. 

 \ Inter. 



1 1 

 1 1 





1 



3 



3 



5 



/ Per. 



\ Inter. 



1 1 

 . 1 1 1 





X 



5 



5 



9 



| Per. 

 1 Inter. 



. 11111 

 . 110 11 











/Per. 



11111 





1 



5 



5 



10 



1 Inter. 



11111 



CD 



ij 



5 



5 



11 



(Per. 

 1 Inter. 



. 2 1111 

 11111 



03 



CD 



O 



r 





6 



6 



7 



/Per. 

 1 Inter. 



1110 

 1111 



h- 1 



i 



-7 



6 



6 



10 



(Per. 



1 Inter. 



111111 

 110 11 





4 



6 



6 



12 



/Per. 



1 Inter. 



111111 

 111111 





1, 





6 



6 



14 



/Per. 

 1 Inter. 



112 2 11 

 111111 



TOTAI 



, 18 



2-6 



2-6 



4-14 



/ Per. 

 1 Inter. 



2-8 ) Range of 

 2-6 ] Variation. 



