PAPERS OX BIOLOGY AND AGRICULTURE 225 



TITLES FOR ILLUSTRATIONS. 



Fig. 1. Location of bogs in Lake and McHenry Counties. Black cir- 

 cles indicate bogs described ; black squares, bogs reported 

 but not yet visited. 



Fig. 2. Map of Cedar Lake showing location of immature bog. 



Fig. 3. View over immature bog on Cedar Lake with floating island 

 in distance. 



Fig. 4. Close view of floating island in Cedar Lake. 



Fig. 5. Yellow birch with slender stems and large tamarack in ma- 

 ture forest in Antioch Bog. 



Fig. 6. Map of group of bogs northwest of Yolo. 



Fig. 7. Pond in center of Saver Bog. 



Fig. 8. Table of distribution of plant species in bogs. 



