DIFFERENTIATION, HEREDITY, SEX 299 



FIG. 138. A. Chromatin extrusion from the nucleus into the cytoplasm in 

 the oocyte of the Medusa, Pelagia noctiluca. After Schaxel. B. Extrusion of 

 chromatin into the cytoplasm during the maturation of the oocyte of Proteus 

 anguineus. After Jorgensen. X 1080. 



