Plate XCm. 



2 c X -t-s 



1x25 



lb X -1. 





3 X ,^ ..2Sr^.„f^. 



3 c X Z'i 



! h X 58 



3 g / a* 





H HGodmn-Austeii. del et lith. 



MARIyCLLA AND MICROCYSTIS? 



Maclure J.C'? Imp . 



