PLATE 4 



EXPLANATION OF FIGURES 



(All eggs illustrated on this plate are from the same series.) 



19 Unfertilized egg. Flemming without acetic, alizarin and crystal violet. 



20 One-half hour after insemination. Flemming without acetic, alizarin and 

 crystal violet. 



21 One hour after insemination. Flemming without acetic, alizarin and 

 crystal violet. 



22 One hour and one-half after insemination. Flemming without acetic, 

 alizarin and crystal violet. 



23 Two and one-quarter hours after insemination . Flemming without acetic, 

 alizarin and crystal violet. 



24 Four hours after insemination. Flemming without acetic, alizarin and 

 crystal violet. 



492 



