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"Diagram showing possible modifications of medusiform and hydriform persons of a colony of Siphonophora. n, pneumatocyst; k, nectocalyces (swimming bells); l, hydrophyllium (covering-piece); i, generative medusiform person; g, dactylozooid with attached tentacle, h; e, nutritive hydriform person, with branched grappling tentacle, f; m, stem. The thick black line represents endoderm, the thinner line ectoderm." — Encyclopedia Britannica, 1893

Siphonophora

"Diagram showing possible modifications of medusiform and hydriform persons of a colony of Siphonophora.…

"Floating colonies of Siphonophora. A, Diphyes campanulata. B, A group of appendages from the stem of the same Diphyes. C, Physophora hydrostatica. D, Seperate nectocalyx of the same. E, Cluster of female sporosacs (aborted medusae) of Agalma sarsii. a, stem or axis of the colony; a', pneumatocyst (air-bladder); m, nectocalyx; c, sub-umbrellar cavity of nectocalyx; v, radiating canals of the umbrella of the nectocalyx; o, orifice formed by the margin of the umbrella; t, hydrophyilia in B, dactylozooids in C; n, stomach; i, tentacles; g, sporosacs." — Encyclopedia Britannica, 1893

Siphonophora

"Floating colonies of Siphonophora. A, Diphyes campanulata. B, A group of appendages from the stem of…