352 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE XXXL 



Fig. 7. The nuclear wall breaks down. The fibers are grouped in 



bundles. 

 Fig. 8. Nucleus with two especially prominent cones. 

 Figs. 9-10. Multipolar spindles; these occur but rarely. 

 Fig. II. Indication of bipolar spindle. 

 Fig. 12, Perfect bipolar spindle. 



