PLATE LIX. 



FIGS. 



1-3. Amoeba vespertilio Penard. (p. 10) Active indi- 

 viduals, x 400. 



4. A. alba Greeff. (p. 11) Active individual. x 150. 



5. Arcella- vulgaris var. hemisphserica (Perty) Wailes. 



(p. 13) View of empty test as seen in section. 

 X 750. 



6-9. Pyxidicula invisitata Averintzeff. (p. 22) Fig. 6. 

 View of living individual seen from above, ft., 

 bifurcated margin of test, p-v., pulsating vesicle. 

 Fig. 7. Sectional view of empty test. Figs. 8 

 and 9.: Different forma of the marginal flange, 

 x 1000. After Brown. 



10-14. Capsellina timtda Brown, (p. 29) Fig. 10. Active 



individual. x 700. Fig. 11. Living individual. 



x 700. Fig. 12. Enlarged view of oral extremity. 



x 1000. Fig. 13. Individual with lips of aperture 



open. x 350. Fig. 14. Encysted individual. 



x 500. After Brown. 



