Part 2 — CHAPTER XVIII. PROTOZOA.
Reading edition
CHAPTER XVIII. PROTOZOA.
The Foraminifera.—The Amœbæ.—Their Wonderful Simplicity of Structure.—The Polycystina.—Marine Infusoria.—Sponges.—Their Pores.—Fibres and Spiculæ.—The Common Sponge of Commerce 378