"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…
"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…