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Group I. INFUSORIANS (Infusoria) 492 



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



(i) Ciliates (2) Flagellates. 



Group 2. AMCEBA-LIKE PROTOZOA (Rhizopoda) - . - - 495 



(i) Shell-bearing Amoebae (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). 



