240 SEMI-CENTENNIAL OF TORREY BOTANICAL CLUB 
716. Jennings, Н. S. Heredity, variation and the results of selec- 
tion in the uniparental reproductionof Difflugia corona. Genetics 
I: 407. 1016. 
78. Harper, R. A. Organization, reproduction, and heredity in 
Pediastrum. Proc. Am. Phil. Soc. 1918. 
