74 THE OCEANIC HYDROZOA. 



The o-ynophores, or female organs, in their essential structure and mode of development, 

 resembled" those of Bipliyes ; but they offered two points of difference: 1. They never 

 contained more than a single ovum ; 2. The surface of this ovum appeared as if wrinkled or 

 covered with anastomosing canals ; but this appearance arises, as in Atlioryhia, merely from 

 the irregular separation of the ovisac from the walls of the calyx. 



