Variation in Anrelia aurita. 



135 



of the tentaculocyst itself, is an additional guide in identification. I did not 

 find a single case in which a branched canal occurred without a tentaculocyst 

 (cases of twinning will be referred to later on), nor did I ever find a tentaculo- 

 cyst except at the margin of a branched canal. It follows that since there is 

 such a close relationship between the two systems, much of what has been 

 said about variation as regards tentaculocysts is applicable to the branched 

 canal system, for there is the same meristic variation in the one as in the 

 other. 



The variation in the branched canals is shown in Tables III. and V., where 

 it is seen that altogether 16 per cent, or 160 individuals are abnormal in this 



Table V. 



Table showing the arrangement of the Branched Canal System in 142 Specimens 

 with an abnormal number of Tentaculocysts. 



No. 



of 



1 

 No. of 



Speci- 



Tenta- 



mens. 



culocysts 



1 



6 



13) 



7 



18 

 5) 





7 



24) 



9 



> 25 





lj 



9 



19' 





10 



10 





10 



1 



s-34 



10 



1 





10 



1 





10 



2 





10 



' 







13 1 



11 



2 [l7 



11 



2 J 



11 



Arrangement of Radial 

 Canals. 



(Per. 

 \ Inter. 

 (Per. 

 I Inter. 

 /Per. 

 1 Inter. 



Per. 



Inter. 



Per. 



Inter. 



Per. 



Inter. 



Per. 



Inter. 



Per. 



Inter. 



Per. 



Inter. 



Per. 



Inter. 

 /Per. 

 \ Inter. 

 /Per. 

 I Inter. 

 (Per. 

 1 Inter. 

 /Per. 

 I Inter. 



1 



1 



1 



1 



1 



1 



1 



1 



2 







2 



1 



2 



1 



1 



1 



1 



1 



1 



1 



1 



2 



2 



1 



2 



1 



1 2 



1 1 



No. of 

 Speci- 

 mens 



No of 

 Tenta- 

 culocysts. 



Total 142 



Range 6-16 



Arrangement of Radial 



Canals. 





/ Per. 



2 



2 



2 2 



1 Inter. 



1 



1 



1 1 



( Per. 



1 



2 



2 1 



1 Inter. 



1 



2 



2 1 



( Per. 



1 



3 



3 1 



1 Inter. 



1 



1 



1 1 



1 Per. 



3 



1 



2 2 



1 Inter. 



1 



1 



1 1 



( Per. 



3 



2 



1 2 



1 Inter. 



1 



1 



1 1 



( Per. 



2 



1 



1 1 



1 Inter. 



1 



2 



2 2 



/ Per. 



2 



2 



1 2 



1 Inter. 



2 



1 



1 1 



( Per. 



1 



1 



1 1 



\ Inter. 



2 



2 



2 2 



/ Per. 



2 



2 



2 2 



1 Inter. 



2 



1 



1 1 



/ Per. 



3 



2 



2 2 



\ Inter. 



1 



1 



1 1 



/ Per. 



3 



3 



2 2 



1 Inter 



1 



1 



1 1 



/ Per. 



3 



2 



3 2 



i Inter. 



1 



1 



1 1 



( Per. 



2 



2 



2 1 



1 Inter. 



2 



2 



2 1 



( Per. 



3 



3 



3 2 



\ Inter. 



1 



1 



1 1 



f Per. 



3 



3 



3 3 



[ Inter. 



1 



1 



1 1 



/ Per. 3- 



•121 



Range of 



\ Inter. 3- 



-7j 



Variation. 



