PLATE LVIII. 
Fas. 
1. Ameba flwida Gruber. (p. 8) Active individual. 
x 400. ; 
2. A. vespertilio Penard. (p. 10) Small active indi- 
vidual. x 400. 
3. A. verrucosa var. papyracea Penard. (p. 10) Active 
individual. x 200. 
4,5. Arcella arenaria Greeff. (p.15) Fig. 4.—Side view 
of empty test. Fig. 5.—View of active individual 
from above. x 500. 
6,7. A. polypera Penard. (p. 16) Fig. 6.—Side view of 
empty test. Fig. 7.—View of active individual 
from above. x 300. 
8. Capsellina timida Brown. (p. 29) Longitudinal view 
of active individual. x 700. After Brown. 
9,10. Bullinula indica Penard. (p.45) Fig. 9.—Side view 
of test. Fig. 10.—Oral view of test. x 200. 
11-13. Microcorycia flava (Greeff) Cockerell. (p.25) Fig. 11.— 
Oral view of individual with extended test and 
partially closed aperture. Fig. 12.—Side view of 
test showing the membrane by means of which the 
aperture can be closed. Fig. 18.—Oral view of test 
partially folded together. x 350. 
