LIST OF ILLUSTRATIONS. 



Plate' I. 

 Plate II. 

 Plate III. 

 Plate IV. 



Plate V. 

 Plate Vr. 



Plate VII. 

 Plate VIII. 



F.ate TX. 



Plate X; 



Plate Xr. 

 Plate XII. 



Plate XIII. 



Plate XVIII. 

 Plate XIX. 



B. 



B. 



B. 



A. 

 B. 



A. 



B. 



Page 

 General view of east shore of South Twin Lake, looking south' 



from Station 1 32 



South Twin Lake, looicing northwest, showing broad shoal with 



a scant rush growth and the zones of shore vegetal ion. ... 32 



South Twin Lake, Station 3, looking northwest, showing the 



region fished as far as the rushes extend 32 



South Twill Lake, looking north, showing an unusually broad 

 beach but with many encroachments of the smail shrub 



zone 32 



South Twin Lake, Station 13, looking north 32 



South Twin Lake, Station 7, looking east. Floating Sparganium 



leaves not shown on account of waves 32 



South Twi.i LaKC, Station 46, looking northwest 32 



South Twin Lake, Station 40, looking west. Mouth of Misery 



Creek 32 



Figure A, a.dult ot He.taerina amerUana (Faoncius) 58 



Figure B, adult of Aurion aequabile (Say) .• 58 



Figure C, nymph of Mncromii illinoiensis WaiSh 58 



Figure D, aduit of Agrion maculalum Beauvais 58 



Figure E, adult ot Anax Junius (Drury) 58 



Figure F, nymph of Hagerius brevistylus Selys 58 



Figure A, labium of a nymph of Macromia illinoiensis Walsh. . 58 



Figure B, tiglire of Ilagenius breiistiilus Selys 58 



Figure C, figure of the labium of Agrion aequabile (Say) 58 



Figure D, side view of the abdomen of Hagenius breiislylus Selys 58 



Figures E and F, fore and hind wings of Anax Junius (Drury) . . 58 



Map of the Whitefish Poiit region, Chippewa Cou.ity, Michigan 160 



Lake Superior beach at Vermilion. I'pper and lower beach 

 shown; the latter with Ammophila arenaria zone, shown 



chiefly in the foreground • 160 



Lake Superior beach with sand ridge crossed by Cranberry 



Creek, just east of Vermilion 160 



Lake Superior beach, looking east toward Vermilion during a 



storm. Showing formation of temporary pools by waves. . 160 



Small portion of Lake Superior beach showing pebble zone and 



small temporary pond 160 



Lake Superior beach with dunes of the first sand ridge 160 



Cranberry Creek (Station 30), looking north and down stream, 



showing a part of the beach pool formed by it (Station 31) . . 160 



Pond on Lake Superior beach (Station 31) formed by Cranberry 



Creek 160 



Beaver dam and i)oud on Mason's Creek (Station 171) 160 



Beach pond in the course of Mason's Creek 160 



Marsh bordering Mason's Creek (Station 172) on Lake Superior 



beach 160 



Looking southwest from high sand dune near Station 101, show- 

 ing marsh and sand ridges with upland in distant back- 

 ground 160 



Marsh Lakes, looking southeast from the high dune near Station 



101 160 



Channel east from Beaver Lake (Station 90) 160 



Channel of Vermilion Lake (Station 25) 160 



Marsh bay of Beaver Lake (Station 55), looking southwest (lake- 

 ward) 160 



The same, looking south 160 



