In some Syllids, such as Pionosyllis gestans, the ova are attached to the body A FIG.
From these masses of ova dehisce into the body cavity and float in its fluid.
To establish the exact relationship it is necessary not only to breed but to rear the medusa, which cannot always be done in 1 In some cases hydroids have been reared in aquaria from ova of medusae, but these hydroids have not yet been found in the sea (Browne [Io a]).
Ov, Ova, two carried on each female gonophore..
To get at the female and the ova prolonged soaking in soap and water is necessary, the epiderm being rubbed away and the ointment then applied.