Guilliermond - A tkinson — 84 — Cytoplasm 



served that in Hyacinthus orientalis the facts are in favor of a 

 passage of the chondriosomes of male origin into the egg. KiYO- 

 HARA, almost at the same time, described in certain phanerogams 

 the passage of plastids from the pollen tube into the oosphere. 

 More recently sfill, Mangenot in gymnosperms (Pine) was able 

 to follow the course of the chondriosomes of male origin because 

 of their size which is greater than that of the chondriosomes of 

 the oosphere. All the chondriosomes of the pollen tube and 

 oosphere are in the form of mitochondria but those in the pollen 

 tube are larger, and can be followed during their penetration into 

 the oosphere during fertilization, and can be recognized after fer- 

 tilization has taken place. During the development of the em- 

 bryo, however, the chondriosomes of male origin remain in that 

 portion of the oosphere which does not contribute to the formation 

 of the embryo and which will later degenerate. Therefore there 

 does not seem to be any mixing of chondriosomes of male and of 

 female origin. 



