xxxvi The MoUuscan Family Planorhidae 



The small bottom and shore fauna of the middle and lower Illinois River and its con- 

 necting lakes, Chillicothe to Grafton: Its valuation, its resources of food supply, 

 and its relation to the fishery, by R. E. Richardson. 5:416-418. 



1925 



Land and fresh-water Mollusca of the Dutch Leeward Islands, by H. B. Baker. 6:193. 

 Conditions imder which Goniobasis livescene occurs in the island region of Lake Erie, 

 by F. H. Krecker. 6:320. 



1926 



Changes in the small bottom fauna of Peoria Lake, 1920 and 1922, bv R. E. Richard- 

 son. 7:229-230. 

 Illinois River bottom fauna in 1923. by R. E. Richardson. 7:230. 



