1050 



MR. C. L. BOULENGER ON 



In such ineclusse it is oWions that the number of secondary 

 tentacles is corielated Avith the size of the individuals, the older 

 and larger medusfe possessing a greater niiniber of these structures 

 than the smaller and younger ones. In Moerisia we are certainly 



Text-fi£r. 223 



Mednsa bearing iom interi-adial tcntscTes in actcHtioii to the fo«r perr.idial ones at 

 the extremities ot the rswlial ramals. In this and in the three following text- 

 iigures A repressiits the uiediisa as seen in a side view, B its oval aspect. 



Textfc. 224, 



B 



Mednsa mtli four iirtaTadial and eiglit adradial tentacles in addition 

 to the four primary ones. 



not dealing with a phenomenon of this kind, for the larger and 

 more mature medusfe are, with rare exceptions, unprovided with 

 secondary tentacles. In order to show this point more clearly, 

 I divided the 400 individuals which I examined into two 



