ATHORYBIA. 89 



The reproductive organs of both sexes are found combined in A. rosacea, as in my 

 species, but, apparent!)', they arc somewhat differently arranged. A sohtary andropliore 

 and a buncli of female organs are attached to the under surface of the hydrosoma, beside 

 each polypite. The male organs have essentially the same structure as that I have described. 

 As to the female organs, Kolliker confirms the account which I had given in ' Midler's 

 Archiv" of the peculiar canals which lie between the ovisac and the calyx, and shows that 

 their structure is in all essential respects the same as in my species. The entire calyx is, 

 he says, covered with cilia, and when detached swims about by their agency. 



Forskal gives the length of the hydrophyllia in J. romcea as half an inch, whence 

 the diameter of the whole animal must be about an inch. Lesson says, " Largeur 1 pouce," 

 but Kolliker's specimens would not seem to have attained half that size, which is about 

 the dimensions of those I observed. Notwithstanding the apparent discrepancies, I am 

 inclined to regard the forms I have described as of the same species as that described 

 by Kolliker. It will be better at any rate to do so provisionally, for M. Kolliker's observations 

 show that the A(Iiori/bi(e are liable to great variation, and it is anything but clear that 

 the A. heliantha of Eschscholz and the J. rnelo of Quoy and Gaimard are distinct from 

 A. rosacea. 



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