MICHIGAN ACADEMY OF SCIENCE. 75 



represent aggregations of some substance precipitated from the 

 nuclear sap during the contraction of the nuclear membrane. Since 

 they have never been found in sections of earlier stages, it is not 

 likelv that they are the opaque globules seen from the surface in 

 the living egg. 



The germinal vesicle usually collapses before the egg escapes from 

 the ovary, but in some females a few eggs with the germinal vesicle 

 still at the surface were found in the body cavity. 



Zoological Laboratory, 

 State ]S'ormal College, 

 Ypsilanti, Michigan. 



