18 COELENTERATA AND 



jSarsia. 1 Bell oval. Tubes four. Tentacles -marginal, 

 four, long, flexible, each with a single bright red pigment 

 spot on under side of base at the extremities of the ves- 

 sels. Proboscis very long, highly contractile ; when ex- 

 panded the extremity reaches far outside the entrance into 

 the bell-cavity. Lips simple, ovaries inconspicuous. 



jS. inirabilis. 



Dipurena. Bell half egg-shnped. Tubes slender, four. 

 Four stiff, short tentacles with an enlarged club-shaped 

 distal extremity. Eye-spot at the basal end. Proboscis 

 very long, with large swellings crowded with ova in fe- 

 male. Lips simple. 



D. strangulata. 



DIPURENA. 



Ectopleura. Bell ovate with a slight apical projection. 

 Tubes four. Eight rows of lasso-cells arranged on the 

 outer wall of the bell in pairs, each pair arising from the 

 base of a tentacle and extending to the apex of the bell. 

 Tentacles four, generally coiled about their origin at the 

 bell rim. Each tentacle in adult with clusters of lasso-cells 

 at intervals in its length. Proboscis two-thirds the height 

 of the bell cavity. Lips simple. 



E. ochracea. 



Closely related to this is the free form of Hydrichthys which is attached to wall 

 of fish Seriola zonata. 



