to be true also for Cassicpea. In this s; ecies I have follov;- 

 fcd every stage in the development of the rhopalium from the 

 first trace of such a structure to its completion and I have no 

 hesitation in saying that tloette's account of this process, 

 which he persistently upholds^ is entirely erroneous. To show 

 that the two views are essentially opposed I introduce Goette's 

 Fig. 49 (Fig. 40a) in which the rhopalium appears as an evag- 

 ination en the oral side of the margin and quite independent 

 of the tentacle. The absorption of the tentacles is rapid 

 and the rhopalial tentacles are absorbed before the rest, so ' 

 that the process is easily overlooked if there is a scarcity 

 of material. Goette's mistake is probably due to this cause. 

 Goette says that generally the tentacles are constricted off 

 but sometimes they are absorbed. I find the latter to be the 

 only method in Gassiopea. 



The gelatinous part of the septa is perforated at about 

 the time of the appearance of the first tentacles. Later the 

 septa become reduced to columellae ard the radial canals are 

 formed by lines of adhesion just as Goette found this to take 

 place in Aurelia. | 



The relations of the septa and septal funnels are about as 

 Cl&us found them to be in Cotylorhiza. Although the septal 



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