BOT.-VOL. II.] ffUS-CASSIA TOMENTOSA L. 347 



c. The fibers forming elongated meshes around 

 the nucleus become smooth (fig. 3). 



d. A felt-like zone is formed partially or com- 

 pletely surrounding the nucleus; granular 

 linin threads appear within the nucleus; the 

 granular zone now takes up about one-half the 

 remaining space (fig. 4.) 



e. The deeply-staining rough fibers of the cyto- 

 plasm, united into cones, estabhsh connection 

 with those of the felt-like zone (fig. 5). 



f . The linin threads of the nucleus become more 

 prominent and finally smooth. They run 

 parallel to each other and to the axis of the 

 cone which has the ascendency over the 



others. 



g. As soon as the threads of a cone become 

 entirely smooth, the nuclear wall breaks down 

 at the base and the linin and kinoplasmic fibers 

 anastomose. The fibers become grouped 

 into bundles (fig. 7). 



h. A multipolar spindle is formed, two cones of 

 which, situated opposite each other, are more 

 prominent than the rest. Sometimes but two 

 cones are present (fig. 8). The two promi- 

 nent cones finally absorb the others, thus 

 forming a bipolar spindle. 



3. The spindle formation for the second division takes 

 place in the manner described for the first, but is even more 

 pronouncedly multipolar diarchal. 



4. The spindles of the daughter nuclei sometimes lie in 

 planes which are sometimes at right angles, sometimes par- 

 allel to each other. 



5. The spindle formation in Cassia tomentosa L. forms 

 a connecting link between the multipolar polyarchal spindle 

 Anlage ordinarily met with in dividing pollen- , spore- , and 

 embryosac-mother-cells, and the multipolar diarchal spindle- 

 Anlage described for vegetative cells. 



In conclusion I beg to acknowledge my great indebted- 



