Egg Pouches and Other Reproductive Structures in Pelagic Chaetognatha

Abstract

Some specimens of Eukrohnia bathyantarctica David from the collections obtained by the United States Antarctic Research Program were observed which had marsupial sacs full of eggs, and hanging from the opening of the oviducts. The eggs in the sacs, in various specimens, appeared at different stages of development, from the gastrular stage up to the eclosion of the larvae.