PLATE 3 



EXPLANATION OF FIGURES 



13 to 17 Ctenolabrus adspersus 9 X Ctenolabrus adspersus cf . 



13 Polar view of an anaphase plate of the fourth cleavage. Forty-four 

 chromosomes. Magnification about 1800 diameters. 



14 Polar view of an anaphase plate of the second cleavage. Forty-four 

 chromosomes. Magnification about 1800 diameters. 



15 Same. Forty-eight bodies, probably not all are entire chromosomes. 

 Magnification about 1800 diameters. 



16 Telophase group of one section showing the transformation of the chro- 

 mosomes into vesicles. 



17 Young nucleus composed of chromosomal vesicles. 



18 to 19 Fundulus heteroclitus 9 X Ctenolabrus adspersus cf . 



18, A, B, and C. An anaphase of the second cleavage cut in three sections. 

 The sections are oblique to the long axis of the spindle. The two poles of the 

 spindle are lettered, respectively, A' and Y. 



19, A and B Two sections of a spindle of the second cleavage. X- and Y 

 indicate the two poles. 



268 



