1919] 



MOORE AND KARRER — A SUBTERRANEAN ALGAL FLORA 



289 



Ser. 

 C 



6' 



7 



7' 



8 



8' 



9 



9' 



10 



10' 



Depth 



60 cm. 



70 cm 



70 cm 



80 cm. 



80 cm. 



90 cm. 



90 cm. 



SERIES C— Continued 



Jan. 14, '16 



100 cm. 



100 cm. 



Mar. 25, '16 



Aug. 22, '16 



P. viride 



P. viride 



P. viride 



P. viride 



P. viride 

 (motile) 



P. viride 



Nov. 10, '18 



P. viride 



P. viride 



P. viride 



P. viride 

 Diatoms 



P. viride 

 (scant growth) 



P. viride 



P. viride 

 (motile) 



