A 



CHART IV. 



CTTTOREA. ST.CROIX RIVER. 



- 18-19 mm. 



16-17111111. 



-15 mm. 



So Si 82 83 84 85 S6 87 88 89 go 91 92 93 94 95 96 97 98 99 100 101 102 103 104105 106 



