(2 cogoma omitted prom Asgrene) 
Fig. 26.— Miastor americana. Diagram illustrating origin and history 
of germ cells from one generation to the next. cl.n = cleavage 
nucleus; ez.chr = extruded chromatin; oég = oégonia; p.b= polar 
body; p.g.c = primordial germ cell; p.o= primary odcyte; p.pl = 
polar plasm. st.c = stem cell. (65) 
F 
