~ 
—— 
Rese fpivrER 
C a- 
oe OS ee ee 
MISSPISIPPI RIVERO AND 
TRIBUTARIES 
FROM PRESCOTT, WIS. TO LAMQILLE MINN.—~ 
MAP SHOWING AREAS 
SURVEYED IN 
FRESHWATER PEARL MUSSEL APPRAISAL INVES ~— 
TIGATION= JULY , AUGUST, 1920 
under Dr. Norman 71. ECrver. 
BUREAU OF FISHERIES) 
JUSTUS FO PIULLER — 
