CHANGES IN THE OVARY 121 



over the nuclear region. (6) Synaptenic stage.— The filaments 

 hecome congregated together in the form of a lump, or dark 

 mass, heaped up at one side of the nuclear region, (c) Pachytenic 



Pachytenio stage. 



FlO. 26.— Developing ova from ovary one day after birth. (After 

 Lane-Claypon.) 



stage. — The nuclear filaments again become unwound, and 

 spread themselves out over the whole nuclear region ; they are, 

 however, considerably coarser than in the earUer stages. 

 (d) Diplotenic stage.— The chromatin strands spht along their 



Diplotenic nucleus three 

 days after birth. 



Dictyate nucleus seven 

 days after birth. 



Fig. 27. — Developing ova. (After Lane-Claypon.) 



whole length, and the two halves of each strand at first he in 

 pairs near to one another, (e) Dictyate stage. — The spht 

 strands pass away from one another, and the chromatin generally 

 becomes distributed once more throughout the nuclear region 

 in the form of a reticulum. 



