PLATE 1 



STUDIES ON GERM CELLS 



ROBERT W. HEGNER 



28 



EXPLANATION OF FIGURES 



Miastuj- americana Fell 



27 A section through the ovary of Miastor showing the accumulation 

 of mesoderm colls to form the nurse chamber (n.c). and the follicular epithelium 



28 Longitudinal section through a nearly grown oocyte. 

 matLn^"''^'^'''^'"'^^ "''*'°'' through an oocyte at the time of polar body for- 



(ff^ ^^^^^f^^'^^'-^^^^^tion through a mature egg showing the female nucleus 

 {J.n), and the polar body {p.h) already divided. 



500 



