R. T. Wells 
219 
EXPLANATION OF PLATE VI. 
N = Nucleus. C. V. = Contractile Vacuole. 
Figs. 1-19 represent the amoeba of type (a). 
Fig. 1. 
Figs. 2, 3 and 13. 
Fig. 4. 
Figs. 5 and 14. 
Figs. 6-8 and 16. 
Figs. 9-11. 
Figs. 12 and 19. 
Fig. 17. 
Fig. 18. 
Cysts. 
Escape of a single motile amoeba from the cyst. 
Empty cyst shell. 
Free motile amoebae. 
Fission. 
Formation of the “ lobulate body.” 
Commencing encystment. 
Amoeba containing endogenous buds. 
Budding forms. 
Figs. 20-28 represent the amoeba of type (6). 
Figs. 20 and 24. 
Figs. 21 and 25. 
Figs. 22, 23 and 27. 
Fig. 26. 
Fig. 28. 
Cysts. 
Free motile amoebae. 
Fission. 
Group of amoebae containing endogenous buds. 
Vacuolated amoeba with irregular chromatin masses. 
Figs. 1-12 and 20-23 are drawn from unstained specimens. 
Figs. 13, 15, 17, 18, 19 and 25 are drawn from specimens fixed with corrosive-acetic 
alcohol and stained with iron-baematoxylin and eosin. 
Figs. 14, 16, 24, 26, 27 and 28 are drawn from specimens fixed with osmic acid and 
stained by Giemsa’s method. 
The drawings were made with a Zeiss’s drawing apparatus, compensating ocular No. 6; 
apochromatic 2 mm., aperture 130 immersion-lens, tube length 160 mm. Each 
division of the scale represents 2 ix. 
