PLATE II 



FIVE STAGES IN THE DEVELOPMENT OF THE OVARY AND OVA OF 



BDELLOSTOMA BURGERI 



Fig. 6. A very young female. All the eggs are spherical and vary in size from mere dots to 0.8 mm. 



in diameter. 

 Fig. 7- A slightly older female. All the eggs are spherical and are of all sizes from 1 mm. in diameter 



to mere dots. 

 Fig. 8. The ne.xt older female. All the eggs are spherical in shape, the largest measuring 1.5 mm. in 



diameter. 

 Fig. 9. The largest eggs are slightly tapered at each end; all smaller eggs are spherical. 

 Fig. 10. The largest eggs are spindle-shaped and measure from 4 to 7 mm. in length. The next smaller 



are eggs 2 mm. long. 



Figures 6, 7, 8 and 9 are the same size as the original drawings. Figure 10 is reduced by one-fourth. 



