Swimming-bells, termed nectocalyces or nectophores (fig.
K, Nectocalyces (swimming bells).
70); no nectocalyces or bracts; appendages all on the lower side of the pneumatophore arising from a compact coenosarc, and consisting of a central After C. Gegenbaur.
Three families: (I) Monophyidae, with a single nectocalyx; examples Muggiaea, sometimes found in British seas, Sphaeronectes, &c.; (2) Diphyidae, with two nectocalyces; examples Diphyes (fig.
72), Praya, Abyla, &c.; and (3) Polyphyidae, with numerous nectocalyces; example Hippopodius, Stephanophyes and other genera.
With an apical pneumatophore, not divided into chambers, followed by a series of nectocalyces or bracts.
With a very large pneumatophore not divided into chambers, but without nectocalyces or bracts.