I7O A. RICHARDS. 



EXPLANATION OF PLATE IV. 



In the latter part of the growth period, following synapsis, yolk is produced 

 (Figs. 31-35) and the nucleoli exhibit certain characteristic features. Figs. 28, 

 29 and 30, selected from the oocytes, show a nucleolus proper, paranucleolus, en- 

 donucleolus and certain peculiar dark (chromatic?) bodies. These bodies give 

 the characteristic staining reaction of chromatin, very dark with gentian violet. 

 The nucleolus with the triple stain is violet, paranucleolus pink, endonucleolus 

 dark. In the paranucleolus a reticulum supporting the endonucleolus can often 

 be seen (29^). 



FIG. 29. King, Ehrlich-Biondi. 



FIG. 30. King, triple. 



FIG. 31. Oocyte showing yolk nucleus. The nucleus is not well fixed in this 

 material. Chrom-oxalic, iron haematoxylin. 



FIG. 32. Sections above the nucleus, passing through the yolk nuclei. Chrom- 

 oxalic, iron haematoxylin. 



