474 



MEDUSAE OF THE WORLD. 



GENERIC CHARACTERS. 



iEginidae with 9 or more tentacles which arise from the outer ends of an equal number 

 of simple, uncleft, peripheral stomach-pouches. With otoporpae above the marginal sense- 

 clubs. 



Cunina is so closely allied to Solmissus that I have felt inclined to merge the two under 

 the older name Cunina, but Dr. Henry B. Bigelow, who has studied these forms in the exten- 

 sive collections made upon Dr. Alexander Agassiz's recent expedition to the tropical Pacific, 

 kindly advises me of the desirability of separating the genera. He states that Solmissus lacks 

 exumbella sensory tracts above the sense-clubs, whereas these are invariably found in Cunina. 

 Moreover Solmissus lacks a marginal ring-canal system, while the species of Cunina may or 

 may not exhibit this character. 



Synopsis of the Described Forms of Cunina. 



