1919] 



MOORE AND KARRER — A SUBTERRANEAN ALGAL FLORA 



293 



SERIES F 



INOCULATED JUNE 6, 1916. SAMPLE FROM MISSOURI BOTANICAL GARDEN. 

 HOLE, AT EDGE OF WOODED NORTH AMERICAN TRACT, DUG UNDER TREES. 

 NATURAL FORMATIOxN; BLACK HUMUS TO 20-30 CM.; REMAINING DEPTH 

 CLAY TO VERY FINE CLAY; DEPTH LIMIT 70 CM. 



Ser. 

 F 



Depth 



Aug. 25, 

 1916 



Sept. 15, 

 1916 



Sept. 19, 

 1916 



Mar. 30, 

 1917 



Nov. 19, 

 1916 



F 



Surface 





Protoderma 

 viride 



P. viride 

 Ulothrix 



variabilis 



P. viride 



P. viride 



F 



Surface 





P. viride 



P. viride 

 U. variabilis 

 Stichococcus 

 bacillaris 



P. viride 

 (motile) 



P. viride 



p 



F" 



Surface 





P. viride 



P. viride 

 U. variabilis 



P. viride 

 (motile) 



P. viride 

 (motile) 



1 



10 cm. 





P. viride 

 U. variabilis 



P. viride 



P. viride 

 U. variabilis 



P. viride 



1' 



10 cm. 





P. viride 



* 



P. viride 



P. viride 



P. viride 



2 



20 cm. 





P. viride 

 U. variabilis 



P. viride 

 U. variabilis 



P. viride 

 U. variabilis 



P. viride 

 U. variabilis 



2' 



20 cm. 





P. viride 

 U. variabilis 



P. viride 

 U. variabilis 



P. viride 

 U. variabilis 



P. viride 

 U. variabilis 



3 



30 cm. 





P. viride 



P. viride 



P. viride 



P. viride 



3' 



30 cm. 





P. viride 

 Trochisciaf 



P. viride 

 Diatoms 



P. viride 



P. viride 



4 



40 cm. 





P. viride 



P. viride 

 Diatoms 



P. viride 

 Diatoms 



P. viride 

 Diatoms 



4' 



40 cm. 



• 



50 cm. 







P. viride 



P. viride 



P. viride 



5 





P. viride 



P. viride 

 U. variabilis 



P. viride 



P. viride 

 U. variabilis 



5' 



50 cm. 







P. viride 





P. viride 

 U. variabilis 



