Plate 20. 
3j II. U. S. F. C. 1901. (To face page 80.) 
2. CHARA CORONATA, TYPICAL FORM. 
V"-' 
3. CHARA CORONATA, 
From shallow water in Squaw Harbor. 
4. CHARA CORONATA 
In shallow water on sandy beach. 
5. CHARA CORONATA. 
An anomalous form from Put-in Bay growing at 
the bottom of 7 feet of water. 
