nool YAMANOUCHI— MITOSIS IN FUCUS 183 



the two nuclei, from the beginning to the end, always proceed simul- 



(k s 



mn 



(fig 



(fig. 5q). The relation of the axes of the two 



(fig. 57). In early metaph 



(fig 



Anaphase and telophase follow as was described in typical mitosis. 

 The centrosomes always persist with a beautiful display of radiations. 

 When the daughter chromosomes reach the poles and become vacuo- 

 late, some of the central spindles seem to be replaced by fibrillar 

 cytoplasm. The cytoplasm between the newly formed nuclei of two 



four 



asmic fibers (fig. 



mother 



plants. 



asmic 



lclei come 

 oogonium, 



period. There then follows a rapid growth in the oogonium, which 

 almost reaches its full size before the third division begins. 



Detailed HpQrrmtirwo ^ +v.^ #•!*;**! ritSn'o^n wpt-p criven bv Farmer, 



■ 



Strasburger 



here. A point or two concerning chromosomes seems worth men- 



tion. 



chromo 



^es of a slightly bent rod-shape are arranged in the equator, they 

 take such a position that their long axes lie parallel to the equator 

 without overlapping one another. As a consequence, the profile 

 |J* of the figure in this stage (fig. 64) shows the end view of the 

 chromosomes and the polar view their whole length. It is very easy 

 t0 dem onstrate that there are 12 chromosomes. The chromosomes 



{fig 



-r«* luuguuainauy in the equator 

 tor position (fig. 66) for a short time, t 

 J P° le s (fig. o», and then the usual anaphase and telopl 

 before the daughter nuclei contain 32 chromosomes. 



AND THE FIRST 



The events which take place during fertilization as well as during 



e segmentation division h*™ Wn <wrihed bv Farmer, Williams, 



