No CrossRef data available.
Hydromedusae with umbrella usually hemispherical or flattened; with gonads on radial canals; marginal sense organs, when present, in form of cordyli or marginal vesicles of ectodermal origin; occasionally with ocelli.
* See Addenda, p. 444.
* See Addenda, p. 444.
* See Addenda, p. 444.
* See Addenda, p. 444.
* See Addenda, p. 445.