Amebula

The adult stage is realised by the formation of a plasmodium which begins early in life to form spores. There are never any flagellated stages in this group, but always amoebulæ.

He saw the swarm-cells swim with a peculiar dancing motion, divide, withdraw the organ of locomotion called the flagellum, and then creep about as amoebulæ. Although he did not actually note the union of the amoebulæ, he inferred that the young plasmodia seen in his cultures arose from their fusion.

After the lapse of a varying period of time (a week, more or less) subsequent to the changing of the pH, a search with the No. 7 objective water immersion lens will reveal large numbers of hatching spores, and creeping amoebulæ of various ages.