9/< 



320117 



CARNEGIE INSTITUTION OF WASHINGTON 



Publication No. 204 



Botanical CoNTRistiTioNs prom the Johns Hopkins University, Nos. 38 and 39. 



Copies of th'n Book 

 wore fir^t issued 



MAR 10 1915 



PRESS OF GIBSON BROTHERS 

 WASHINGTON, D. C. 



