Micliigan GeoloKicul ami 

 Biological Survey. 



I'lililicatioii 20: Biology 4. 

 I'lat.- XX 



A. MARSH BAY OF BKAVKR LAKE (STATION r,2). LOOKIXf! XOK THEAST 



B. NORTHWEST siioKi; oi iu;a\i;i{ i.aki: isiAiiox .")'.i>. Looking 



Nou rm:AST. 



