PLATE 2 



EXPLANATION OF FIGURES 



() to 12 Cteitolabrns adspersus 9 X Cienolabrus adspersus cf . 



6 Metaphasc of the fourth cleavage in three sections. The rods are split 

 preparatory to division. 



7 An anaphase of the fourth cleavage in three sections. 



8 and 10 Anaphases of the second cleavage. 



9 Anaphase of the fourth cleavage. 



11 Polar view of an anaphase plate from a fourth-cleavage spindle. Thirty- 

 eight chromosomes. Magnification about 1800 diameters. 



12 Same. Forty-one chromosomes. Magnification about 1800 diameters. 



266 



