BY DR. E. VON LENDENFELD. 241 



Solmundus. Haeckel. 

 Solmundella. Haeckel. 

 Solmoneta. Haeckel. 

 Solmaris. Haeckel. 



In this list, of course, by no means all known genera are 

 mentioned, but I have endeavoured not to omit any of the more 

 recently established ones. 



The older genera, for instance, of Lomouroux and Lamai'ck, and 

 those recent ones, which appear too doubtful, have not been 

 included. 



This classification will, like all its predecessors, doubtlessly be 

 full of errors, but I think the leading idea of it is the correct one, 

 although the application of it in detail has in many cases very 

 likely been a wrong one. And so I beg the reader to judge 

 mildly of this attempt at a reasonable classification of the Hydro- 

 medusae. 



