Brit. Antarct. Exped. 1907-9. 



Vol. 1. Plate XXIV. 



W. & G. S. WEST: FRESHWATER ALG/E. 



OO 



-~ 



98 88 GO 

 IB 808 00 



CDCD SS QQ \jQ 



u . 



G. S. WEST. ad. nat. del. 



