Myxomycetes or Slime Molds (1931)

"Deals with those very interesting but little-known group of border-line organisms which are sometimes plants and sometimes animals. The first reel shows scenes of the native haunts of the slime molds, and several types of fruiting bodies, the breaking open of a spore, the release of a colorless, flagellated swarm cell, which swims around at first, but later loses its flagella and be- comes amoeboid.

Nikolai Sivertsen

Source: Myxomycetes or Slime Molds (1931)