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Updated: May 23, 2025
Investigations had been made on the Hydroid stock, described as Coryne, and upon its Medusoid offspring, described as Sarsia, named after the naturalist Sars, whose beautiful papers upon this class of animals have associated his name with it; but the investigations by which all these facts have been associated in one connected series are very recent.
This group of Hydroids retains the name of Coryne; and the Medusa born from it, Sarsia, has received, as I have said, the name of the distinguished investigator to whose labors we owe much of our present knowledge of these animals. Let us look now at another group of Hydroids, whose mode of development is equally curious and interesting.
All the Medusas, whether they arise from buds on the Hydroid stock, like the Sarsia, or from transverse division of the Hydroid form, like the Aurelia, or grow directly from the egg to maturity, without pausing in the Hydroid phase, like the Campanella, agree in the general division and relation of parts.
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