736 THE AMERICAN XATL'R A LIST. [Xol. XXXVIIl. 



the surface of the nucleus and thus form a dense felt around 

 the nuclear membrane. Presently the nuclear nu nibrane which 

 was before a definite film becomes \\a\ v \\\ outhne and often 

 granular m appearance. The nucleolus shows signs of dissolu- 

 tion and there is a marked increase in the number of intranuclear 

 fibers, which are chiefiv or wholly of nuclear origin. After the 



disappearance of the nuclear membrane some of the peripheral 

 fibers push outward to form several cones of a multipolar figure 

 {hig. 14^). The fibers attached to the chromosomes gather 

 into bundles that extend towards these poles. Finally the bun- 

 dles of fibers become more regular and straighten out so that 

 they co:Tie to lie approxim.it jly parallel to one another, and thus- 



