filograna-stage

Updated: May 24, 2025

In the short period of a few weeks or months, the changing forms of the embryo and larvae will pass before us, a more or less complete and more or less true picture of the transformations through which the species, in the course of untold thousands of years, has struggled up to its present state. With a barbate opercular peduncle, Filograna-stage;

Fritz Muller - Facts and Arguments for Darwin