SMITHSONIAN EXPLORATIONS, 1 937 



85 



Fig. 87. — The rich and various diatom flora of Ink Pot 

 Lake, a shallow, medium hard water, alkaline, drainage 

 lake. 



Fig. 88. — The meager and restricted diatom flora of For- 

 estry Bog, a very soft water, highly acid, dark-colored 

 closed bog. 



