Embryology. 



FIG. 37. Study of successive changes taking place in the nucleus of an epithelium- 

 cell, preparatory to division of the cell. (From Qtiairi 's Anatomy, after Flem- 

 ming.) a, resting cell, showing the nuclear network ; b, first stage of division, 

 the chromatoplasm transformed into a skein of closely contorted filaments ; c to/, 

 further stages in the growth and looping arrangement of the filaments ; g, stellate 

 phase, or aster ; h, completion of the splitting of the filaments, already begun in 

 /and^-; t,J, k, successive stages in separation of the filaments into two groups ; 

 /, the final result of this (diaster) ; m to q, stages in the division of the whole 

 cell into two, showing increasing contortion of the filaments, until they reach the 

 resting stage at q. 



K 2 



