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Group I.— INFUSORIANS (Infusoria) 492 



Structure of Slipper Animalcule (Paramoecium) and Bell Animalcule (Vorticella). 



(i) Ciliates — (2) Flagellates. 



Group 2. — Amceba-like Protozoa (Rhizopoda) 495 



(i) Shell-bearing Amcebce— (2) Foraminifera— (3) Sun Animalcules (Heliozoa)— 



(4) Ray Animalcules (Radiolaria) — (5) Mycetozoa. 



Group 3. — Gregarines (Sporozoa) 498 



Structure and Development of the Cockroach Gregarine (Clepsidrina blattarum). 



