430 EDWIN G. CONKLIN. 



EXPLANATION OF PLATE VII. 



FIGS. 37-42. Various eggs from one experiment, viz., No. 809. 2 per cent. 

 NaCl 15^ hrs. All figures show the chromatin in a densely chromatic mass and 

 in all cases except Fig. 37, where the egg nucleus consists of several karyomeres, 

 all the chromatin of each nucleus is aggregated into a single mass. On the other 

 hand the achromatin consists of vesicles of different sizes which are more or less 

 widely scattered, though a large achromatic vesicle is usually found adjoining a 

 chromatic mass. This achromatin has not been squeezed out of the chromatic 

 mass by the action of the salt solution, but the chromosomes of the daughter nuclei 

 have been prevented from absorbing achromatin by the action of the salt solution. 



