86 



MORPHOLOGY OF SPERMATOPIIYTES 



the ventral canal cell and of the egg. He called attention to 

 the fact that the two cells differ from each other only in the 

 quantity of cytoplasm, and concluded that the ventral canal cell 



FIG. 65. Pinus Laricio : A, the ordinary spindle in cutting off the ventral canal cell ; 

 B, disorganizing ventral canal cell ; C, an unusually large spindle in cutting off 

 ventral canal cell, the two nuclei being of the same size and showing the same de- 

 velopmental changes : Z>, a large ventral canal cell ; E, the wall separating a large 

 ventral canal cell and the egg has broken down (n. ., nucleus of ventral canal cell ; 

 n. 0., egg nucleus) ; A-D, x 500. After CHAMBERLAIN. 



is evidently an arrested gamete. Chamberlain further strength- 

 ened this view by discovering a series in which a ventral canal 

 cell very much larger (" eight to ten times ") than usual was cut 

 off (Fig. 65, (7, .D). Its nucleus had reached the size of the egg 



