THE RELATION BETWEEN AMITOSIS AND MITOSIS. 



105 



FIG. 9, A, 9, B. 



doubtful cases. Fig. 9, B, is a cell from the same ovary with 

 two nucleoli apparently connected. 



The Figs. 7-9 are taken from M. expansa. Since the course 

 of development is identical in both species so far as can be 

 observed, it is not necessary to duplicate all stages in two species, 

 but a few typical cells and cell-groups from the ovary of M. 

 pianissimo, are figured. Fig. 10, A, and 10, B, both show 

 characteristic cases of amitosis in the earliest stages of ovarian 

 development. Fig. 1 1, A, shows two cases and Fig. 1 1, B, one. 

 The case a in Fig. n, A, represents a rather interesting stage 



II 



12 



C 



D 



13 



FIGS. 10, A, 10, B, 11, A, n, B. FIG. 12, A-\2, C. FIG. 13, ^-13, E. 



