!'•' 



PROCEEDINGS 



OF THB 



CALIFORNIA ACADEMY OF SCIENCES 



Third Series 

 Botany Vol. II, No. 2 



The Development of the Karyokinetic 



Spindle in the Pollen-Mother-Cells 



of Lavatera 



BY 



Edith Sumner Byxbee 



With Four Plates 



Issued October j/, igoo 



SAN FRANCISCO 

 Published by the Academy 

 1900 



