PLATE 3 



EXPLANATION OF FIGURES 



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



13 Unfertilized egg. Modified Bouin, alizarin and crystal violet. 



14 Fifteen minutes after insemination. Modified Bouin, alizarin and crystal 

 violet. 



15 Forty-five minutes after insemination. Modified Bouin, alizarin and 

 crystal violet. 



16 Two hours and forty-five minutes after insemination. Modified Bouin, 

 alizarin and crystal violet. 



17 Eight hours and fifteen minutes after insemination. Modified Bouin, 

 alizarin and crystal violet. 



18 Thirty minutes after insemination. Modified Bouin, iron hematoxylin. 



490 



