Embryology. 



TK. 



IX. 



X. 



XL 



XII. 



VI., VII. The V-shaped filament* are splitting longitudinally ; their structure of fine 



VI., and VII. 



VIII. Equatorial arrangement of the four chromatin loops in the middle of the 

 now segmenting ovum : the achromatic substance forming a spindle-shaped 

 system of granules with fibres radiating from the poles of the spindle (attraction- 

 spheres) ; the chromatin forms an equatorial plate. (Compare Fig. 36 G.) 



IX. Shows diagrammatically the commencing separation of the chromatin fibres 

 of the conjugated nuclei, and the system of fibres radiating from the attraction- 

 spheres. (Compare again Fig. 36 G.) p.c ^ polar circle ; t.c., equatorial circle ; 

 c.e., central particle. 



X. Further separation of the chromatin filaments. Each of the central particle* 

 of the attraction-spheres has divided into two. 



XI. The chromatin fibres are becoming developed into the skeins of the two 

 daughter-nuclei. These are still united by fibres of achromatin. The general 

 protoplasm of the ovum is becoming divided. 



XII. The two daughter-nuclei exhibit a chromatin network. Each of the attraction- 

 spheres has divided into two, which are joined by fibres of achromatin, and con- 

 nected with the periphery of the cell in the tame way as in the original or parent 

 sphere, III. 



