30 Proceedings of the Ohio State Academy of Science. 



chiefly pure societies of Nelumbo lutea. Fig. ii is a view of the 

 shore near Avondale. The sudden transition from a broad zone 

 of Nelumbo lutea to the willows, which is due to deeper water 

 along shore is strikingly shown. 



The tracks of the Baltimore and Ohio railroad parallel the 

 shore from Thornville Station to Avondale, the roadbed lying 

 near the base of the hills. The wagon road runs for half a 

 mile upon the summit of this ridge of hills, the deep drift cover 



Fig. 11. — View near Avondale. The sudden transition from a Nelumbo 

 zone to the Willows is due to the absence of very shallow water and a 

 mud flat at the shore line. 



of which contains many granite boulders. This ridge broaden- 

 ing greatly toward the northeast was the watershed between 

 the old Newark River to the north and Jonathan Creek to the 

 east. The shallow water along the shore bears a rather irregu- 

 lar belt of marsh vegetation which is broadest and most luxuri- 

 ant at the mouths of the ravines. From Avondale northward, 

 groups of small, generally wooded, islands skirt the shore. 



The lake extends into a long irregular arm to the north, 

 the broad, open valley of a former stream. This northern 



