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the: BOTANICAL ■3IAGAZIN-K. 



[Vol. 3fX:V. No. -294. 



the poles they show no sign of nuclear formation, but they 

 remain in the same condition as in the equatorial plate 

 (Fig. 19). This course of event makes one to bring a view 

 forward, that in thm abnormal case there is probably no in- 

 terkinesis stage. In fact I have met with a cas^, where in 

 one of the groups of chromosomes the spindle fibres w^efe 

 clearly observed which must represent the second division, and 

 contrary to the normal case there was no partition wall 

 between both groups (Text-fig. 1). But in another section of 

 this cell a constriction of the cell wall from one side was 

 found in the middle part of the cell. At first I took it for an 

 artifact, but afterwards many such cases were found, and I 

 have reached the conclusion that it was merely an abnormal 

 process of the cell division. A similar phenomenon was men- 

 tioned by Shibata and Miyake in the case of the development 



Text-fig. 1—4. Abnormal case in * Amber rice f;op corn.' 1. Two segregated 

 chromosome groups after heterotype division, the right hand one showing a sign of 

 homotype division. X 1280. 2. Two resting nuclei directly after heterotype division. 

 Constriction of cell wall begins. X1280. 3, Completely divided sister cellj-', two 

 nuclei in the left hand cell formed through the second division. X 1280. 4. Incom- 

 pletely divided mother cell. Three dwarf nuclei and few chromosomes left in cytoplasm 

 are found. X1280. 



