PLATE 14 



EXPLANATION OF FIGURES 



76 to 79. Ctenolabrus adspersus 9 X Menidia menidia nolata cT. 



76, 77, and 78 Typical anaphases from eggs which were killed two hours and 

 forty-six minutes after fertilization. Only one section of each spindle is drawn 

 and not all of the chromosomes present in the sections were drawn. 



79 A polar view of an anaphase plate from the same material as that used for 

 the previous drawings. Forty-one chromosomes counted. 



80 to 88. Menidia menidia notata 9 X Ctenolabrus adspersus d^. 



80 Metaphase of fourth-cleavage. Chromatin is being pushed out toward the 

 newly formed cell wall. 



81 Anaphase of third cleavage. Entire chromosomes are passing to one of the 

 poles. 



82 Same as 81, A Undivided chromosomes. 



83 Anaphase of third cleavage. Chromatin masses at the equator of the 

 spindle. 



84 Same as 83. Much undivided chromatin at the equator of the spindle. 



85 Anaphase of the third cleavage. Chromatin which is not undergoing 

 division is lying at one side of the spindle. 



86 Shows the lagging chromosomal vesicles extending from one j)ole of the 

 spindle to the equator. 



87 and 88 Telophases of the third cleavage. Both spindles show unexpanded 

 chromatin at the equator of the spindle. 



290 



