Abstract
The membrane of karyokinetic spindle in Ehrlich ascites tumor cells and that in ovary tissue cells of mouse are demonstrated by applying Pb(NO3)2 solution as pretreatment and Bouin's fluid as post-fixation. CdCl2 solution as pretreatment is also effective for the conservation of spindle membrane in tumor cells.
So far as karyokinetic spindles are concerned, there is no essential difference in the origin and developmental process between the mitosis in both plant and animal cells.
