M. W. Jp:fps and C. Dobell 
o()7 
DESCRIPTION OF PLATE VII. 
All figures depict Dientamoeha fragilis ri. g., n. sp. The drawings of stained specimens 
(Figs. 4-6 and 8-15) were made with the camera lucida, and are drawn accurately to 
scale at a magnification of 2500 diameters. The figures of livhig organisms (Figs. 1-3 and 7) 
aie drawn from freehand sketches, made approximately to the same scale. The stained 
specimens are from preparations fixed with Schaudinn’s fluid and stained with Heidenliain’s 
iron-haematoxylin. The drawings were made under a 2 mm. apoehromat (N. A. = 1-40), 
with compensating oculars, and an achromatic condenser. 
Figs. 1, 2, and 3. A living organism drawn at three successive moments during locomotion. 
Figs. 4 and 5. Binucleate individuals of very large size. 
Fig. 6. Binucleate individual of medium size, containing large spindle-shaped vacuole. 
Fig. 7. Degenerated amoeba, resembling a dead Blastocystis. Unstained specimen. 
Fig. 8. Form similar to Fig. 7, from a stained specimen. 
Fig. 9. Uninucleate individual of medium size. 
Fig. 10. Binucleate individual of medium size, showing structure of karyosomes when 
stain is strongly extracted. 
Fig. 11. Small binucleate individual. 
Fig. 12. Small iminucleate individual. 
Fig. 13. Very small binucleate individual. 
Fig. 14. Very small uninucleate individual. 
Fig. 15. Individual of medium size with single nucleus in process of division. 
