OHIO NAIDID^ 



is either absent or extremely sliort in Xai 



suggests that until a >]!ecies is t'oiuul in v 

 developed and in which liie tlor^al huii 

 sette, the -enera n;ay he run.i. Irre. 1 <h 



I take pleasure in .le.licatinn' this spec 

 Osborn, Direetor of the Lake Laboratory, 

 Kenyon College 

 Gambier, Ohio 



BIBLKXlIiAPHY 



