﻿282 BOTANICAL GAZETTE [APRIL 



Fig. 41. The anaphase of the same division; the pairs of granddaughter 



segments are similar to those in the pollen mother- cells. 



Fig. 42. Embryo-sac with two daughter nuclei which are nearly in the 



resting condition; the connecting fibers have not entirely disappeared; less 

 highly magnified- 



Fig. 43. An upper daughter nucleus in an early stage of spindle-forma- 

 tion ; the nuclear membrane as such has disappeared, and numerous spindle 

 fibers have penetrated the nuclear cavity; the chromatin spirem is not seg- 

 mented; the free ends have been made by the knife. X 1500. 



Fig. 44. Bipolar" spindle of second division; the spirem does not seem 

 completely segmented. X 1500. 



Fig. 45. A mature spindle; the chromosomes are regularly oriented in 

 the nuclear plate; the long, slender segments are contiguous and twisted 

 upon each other. X 1500, 



Fig, 46. The same in metakinesis. X 1500. 



