MOLLUSCA FROM INDIANA AND OHIO 457 



Polygyra clausa (Say). Characteristic shells of this small 

 Poiygyra are common in the deposit. These do not differ materi- 

 ally from the recent forms of this species. 



Polygyra fraterna (Say). This small Polygyra is reported by 

 Mr. Fluck, who has found it more or less common at times. 



Polygyra stenotrema (Fer.). Typical forms of this species are 

 not uncommon in the deposit. 



LIST OF WORKS CONSULTED 



Baker, Frank Collins 



1906. "A Catalogue of the Mollusca of Illinois," Bull. III. State Lab. 

 Nat. Hist., Vol. VII, pp. 53-136. 



1918. "Post-glacial Mollusca from the Marls of Central Illinois," 

 Jour. Geol., Vol. XXVI, pp. 659-71. 



1919. "Description of a New Species and Variety of Planorbis from 

 Post-glacial Deposits," Nautilus, Vol. XXXII, pp. 94-97. 



BlLLUPS, A. C. 



1902. "Fossil Land Shells of the Old Forest Bed of the Ohio River," 

 Nautilus, Vol. XVI, pp. 50-51. 



Daniels, L. E., and Blatchley, W. S. 



1903. "On some Mollusca Known to Occur in Indiana," 2'/th Annual 

 Report, Dept. of Geol. and Nat. Res. Indiana, pp. 579-680. 



Leverett, Frank 



1902. "Glacial Formations and Drainage Features of the Erie and Ohio 

 Basins," Mon. U.S. Geol. Surv., No. XLI. 

 Pilsbry, Henry A. 



1890. "Preliminary Notices of New Amnicolidae, " Nautilus, Vol. IV, 

 pp. 52-53. 



QUINN, E. J. 



191 2. " Soil Survey of Bartholomew County, " 36th Annual Report, Dept. 

 oj Geol. and Natural Res. Indiana, pp. 320-34. 



