ANTHOMEDUSjE BOUGAINV1LLJA. 



157 



Nemopsis is separated from Bougainvillia by the tentacles, composing its 4 radially 

 situated, marginal clusters, being of two distinct kinds (clubbed and simple-ended). The mar- 

 ginal tentacles ot Bougainvillia are all of one sort and do not terminate in knobs. Vanhoffen, 

 1891, shows that we can not separate Nemopsis from Bougainvillia upon the mere length of the 

 radial pouches of its stomach, for some medusx of Bougainvillia display pouches of consider- 

 able length. 



Tabular Synopsis uj the Medusa of Bougainvillia. 



*This medusa appears to be B. supfreiliaris which has lost some trnt.ulrs. H. <m>r,i, I.inko, 1^04, is pmbablv a \.irii-iv <-\ 

 B. Mtpcrciliarh from Arctic Ocean. 

 fAn immature medusa? 



