PLATE I. 



Class-PBOTOZOA. 



Amceba. 



FIG. 1. AMCEBA : FREE, x 300. 



ec. ectosarc : en. endosarc : n. nucleus : p. pseudopodium : f. food 

 particles and food vacuoles : v. contractile vacuole. 



FIG. 2. AMCEBA: ENCYSTED, x 300. 



FIGS. 3, 4, 5. VARIOUS STAGES IN EEPRODUCTION BY FISSION, x 300. 



Gregarina. 



FIG. 1. GREGARINA OF THE EARTHWORM, x 50. 



ec. ectosarc bounded by the capsule : en. endosarc : n. nucleus. 



FIGS. 2, 3, 4, 5, 6. REPRODUCTION BY CONJUGATION. 

 p. pseudo-navicella3. 



THE SLIPPER- ANIMALCULE (Paramcecium}. 



FIG. 1. PARAMCECIUM. x 3 f . 



m. mouth : p. pharynx : ec. ectosarc : c. cuticle, with cilia project- 

 ing through it : en. endosarc: n. nucleus: v. 1 , v. 2 contractile 

 vacuoles. 



FIG. 2. POSTERIOR END: SHOWING TRICHOCYSTS PROTRUDED, x 3 f. 

 THE BELL-ANIMALCULE ( VorticeUci). 



FlG. 1. VORTICELLA: EXTENDED. X 3 |. 



m. mouth : d. disc : n. nucleus : v. contractile vacuole : s. stalk with 

 contractile fibre. 



FIG. 2. VORTICELLA: CONTRACTED, x 3 . 



n. nucleus : v. contractile vacuole : /. food vacuoles. 



FIG. 3. VORTICELLA: CONJUGATION, x 3 f. 



FIG. 4. VORTICELLA: UNDERGOING FISSION, x 3 . 



