抄録
1. Comparative electron-microscopic studies have been carried out on three natural strains of Blepharisra undulans with special reference to the pigment granules occurring in the subpellicular layer.
2. The micrographs of sections of the deeply-pigmented Ni-1 strain animals show numerous spheroidal granulated granules, 0.5μ in diameter.
3. The colorless Na-white strain animals, on the other hand, possess no granulated granules, but show some irregular-shaped compact granules which are 0.2-0.4μ in diameter.
4. In the pink-colored Na strain animals, both types of granules are ound mixed in varying ratio.
5. The granulated granules and the compact granules in the electron micrographs seem to correspond respectively to the red and the colorless granules in the light microscope image.
6. The granules are distinct in nature from mitochondria, which occur underneath the layer of pigment granules in the ectoplasm.
