CONIFERALES 



329 



for there were two groups of nuclei, one at the base and the other at 

 the top of the egg. 



E D 



Fig. 323. — Pinus laricio: formation of ventral canal cell; A, typical mitotic figure; 

 B, ventral canal cell disorganizing; C, unusually large mitotic figure cutting off a large 

 ventral canal cell; D, a large ventral canal cell; E, the wall between the ventral canal 

 cell and the egg has broken down leaving both nuclei free in the egg: nv, nucleus of 

 ventral canal cell; no, nucleus of egg; A-C, X500; E, Xroo. — After Chamberlain. '"^ 



In Torreya^^"- it is probable that no ventral canal mitosis occurs. 

 The material was so abundant and the observer so competent that 



