133 
Acer negundo , Z., and Staphylea trifolia , Z. 
Fig. 39. The mature spindle of the first or heterotypic mitosis. Note the zone of coarser 
granules in the cytoplasm surrounding the spindle and the collections of oil globules in the plane of 
the equator. 
Fig. 40. A polar view of the same stage, showing the thick lumpy form of the chromosomes 
and their arrangement in a circular disc or plate. 
Fig. 41. The close of the anaphase. The longitudinal split in the daughter segments is 
scarcely visible. Cytoplasmic granules more evenly distributed. 
Fig. 42. One pole of the spindle at the close of the anaphase, showing details more distinctly. 
Fig. 43. One nucleus in a telophase of first mitosis. The nuclear membrane has just been 
formed. 
Fig. 44. A polar view of a daughter nucleus at a later stage than the preceding. The masses 
of chromatin of varying sizes are connected by numerous fine anastomosing threads. 
Fig. 45. A longitudinal section of a daughter nucleus in about the same stage as Fig. 44. 
