CYTOLOGIC AT, STUDIES OX CEREALS AND THEIR HYBRIDS. 175 



the prochromosomes, winch are nothing but a specialized form of chromatin, appear inde- 

 pendently of linin. With the growth of the nucleus, chromatin increasing in size and 

 number and connected with linin, forms the chromosomes in prophase. At this time, the 



rial line. Thus as Rosenberg has already stated in the case of Drosera hybrid, tl 

 •hromosomes in our case show also the nature of polarity (PI. X. Fig. 5). In son 



mother-cell. However, th< 

 (PL X. Fig. 3). 



Reduction Division in Hordeum distichon, 

 Triticum vulgare and Secale cereale. 

 Pre- synaptic Phase. 



f the chromosomes (PL X. 

 The young spherical pro 



