286 



[Vol. 6 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 



SERIES II 



INOCULATED OCTOBER 1, 1915. SAMPLE FROM MISSOURI BOTANICAL GARDEN, 

 NORTHWEST CORNER OF LINNEAN HOUSE WALL. FILLED IN TO 45 CM.; 

 BLACK HUMUS TO 20 CM.; BELOW THIS A GRADUAL CHANGE TO PURE 

 CLAY; VERY FINE CLAY AT 37 CM.; DEPTH LIMIT 100 CM. 



Ser. 



Depth 



Feb. 24, 



Mar. 29, 



Apr. 11, 



June 7, 



Aug. 25, 



Nov. 14, 



B 



1916 



1916 



1<)16 



1916 



1916 



1916 



B' 



Surface 







Pro'oder- 



P. viride 



P. viride 



P. viride 











via 



(motile) 



(motile) 



(motile) 











nride 



Stichococ- 

 cus 

 bacil- 



S. baeil- 

 laris 



S. bacil- 

 laris 











P. viride 



laris 







B' 



Surface 





P. viritk. 



P. viride 



P. viride 



P. viride 













(motile) 



(motile) 

 *S. bacil- 



laris 

 Ulothrix 



varia- 



Diatoms 















bilis 





B" 



Surface 









P. viride 



P. viride 

 (motile) 

 S. bacil- 



laris 

 U . varia- 

 bilis 



P. viride 



1 



10 cm. 





P. viride 



P. viride 



P. viride 



P. viride 



P. viride 









(motile) 



Cladopho- 



Cladopho- 



Trochis- 



U. varia- 











ra sp. 



ra sp. 



ciaf 



bilis 











Diatoms 



Diatoms 



U. varia- 

 bilis 



Diatoms 















Diatoms 





V 



10 cm. 



4 





P. tiride 



P. viride 



P. viride 



P. viride 



Diatoms 



2 



20 cm. 





P. viride 



P. tiride 



P. viride 



P. viride 



P. viride 









(motile) 



(motile) 



(motile) 



(motile) 



(motile) 









Diatoms 



Diatoms 



Diatoms 



Diatoms 



Diatoms 



2' 



20 cm. 











P. viride 

















(motile) 

















Diatoms 



