ClipArt ETC
"Diagram of Clava, showing a hydriform person surrounded by a verticil of degenerate medusiform persons (sporosacs)." — Encyclopedia Britannica, 1893

Clava

"Diagram of Clava, showing a hydriform person surrounded by a verticil of degenerate medusiform persons…

"Diagram of a colony of dicoryne, showing three forms of persons. a, normal hydriform person; b, modified bud-bearing hydriform person (blastostyle); c, degenerate medusiform persons (sporosacs)." — Encyclopedia Britannica, 1893

Dicoryne

"Diagram of a colony of dicoryne, showing three forms of persons. a, normal hydriform person; b, modified…

"Diagram of a colony of Hydractinia, showing four forms of persons. a, hydriform person; b, modified hydriform person, or blastostyle, bearing c, degenerate medusiform persons or sporosacs; d, modified hydriform person situated at the margin of the colony (dactylozooid)." — Encyclopedia Britannica, 1893

Hydractinia

"Diagram of a colony of Hydractinia, showing four forms of persons. a, hydriform person; b, modified…

"Two female sporosacs (degenerate medusae) of Hydraetinia echinata. a, ectoderm; b, endoderm; o, eggcella; g, entric cavity. In A an invagination of the ectoderm, which is more complete in B, represents the rudiment of the sub-umbrella space." — Encyclopedia Britannica, 1893

Sporosac

"Two female sporosacs (degenerate medusae) of Hydraetinia echinata. a, ectoderm; b, endoderm; o, eggcella;…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Sporosac, with imcomplete extension of the enteric cavity into the umbrella,-rudimentary invagination above to form the sub-umbrella cavity." — Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Sporosac with manubrial portion only of the enteric cavity." — Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Sporosac without any trace of manubrium." — Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"A single hydriform person a bearing a stalk carrying numerous degenerate medusiform persons or sporosacs b." — Encyclopedia Britannica, 1893

Tubularia Indivisa

"A single hydriform person a bearing a stalk carrying numerous degenerate medusiform persons or sporosacs…