Fig. 11.—A chain of spherical blue-green algæ.
Fig. 12.—A chain of spherical bacteria.
Fig. 13.—A pair of spherical blue-green algæ.
Further the chemical composition of bacteria is more like that of other fungous plants than of any of the forms classed as animals.
Fig. 14.—Spherical bacteria. Several pairs are shown.
Fig. 15.—Yeast cells. Some show typical budding.