450 



WILSON. 



[Vol. XI. 



and the substance of the two nuclei completely fuses, so that 

 not the least visible distinction between the paternal and 



Fig. III. — Conjugation of the nuclei. Extension and division of the aster. 

 \c/. Phototype 4.] (10-13 minutes.) 



maternal elements remains. In this way a true reticular 

 cleavage-nucleus is formed in accordance with the original 

 description of Hertwig. 



