1919] 



MOORE AND KARRER — A SUBTERRANEAN ALGAL FLORA 



295 



SERIES G 



INOCULATED SEPTEMBER 26, 1916. SAMPLE TAKEN FROM MISSOURI BOTANICAL 

 GARDEN, NEWLY EXCAVATED TRENCH PARALLEL WITH LINNEAN HOUSE 

 WALL. PACKED ROAD-BED INTERMIXED WITH TAR TO 10 CM.; NATURAL 

 FORMATION AT 20 CM.; REMAINING DEPTH GRADUALLY GRADING INTO 

 CLAY; DEPTH LIMIT 40 CM. 



Ser. 

 G 



Depth 



Nov. 2, '16 



Mar. 12, '17 



G 



Surface 



Protoderma viride 

 Stichococcus bacillaris 

 Ulothrix variabilis 



P. viride 

 S. bacillaris 

 U. variabilis 



G' 



Surface 



P. viride 

 Cladophora sp. 



S. bacillaris 

 U. variabilis 



P. viride 

 Cladophora sp. 

 S. bacillaris 

 U . variabilis 





1 



10 cm. 



P. viride 

 Cladophora sp. 



P. viride 

 Cladophora sp. 



V 



10 cm. 



P. viride 

 Cladophora sp. 



P. viride 

 Cladophora sp. 





2 



20 cm. 



P. viride 



P. viride 





2' 



20 cm. 



P. viride 



P. viride 





3 



30 cm. 



P. viride 



P. viride 





3' 



30 cm. 



P. viride 



P. viride 





4 



40 cm. 



P. viride 



P. viride 





4' 



40 cm. 



P. viride 



P. viride 



