The Mollusca of Eastern Iowa. 6i 



most careful search continued for a number of years failed to 

 bring the species to light outside of this area in this section of 

 the state. It has also been found in Hardin county by Dr. 

 King, Mr. J. W. Preston and the writer. Thousands of spec- 

 imens were taken in both localities. It is a very common 

 Lcess fossil. 



SUB-CIvASS— PULMOTSIATA. 



Order — Styl^omatophora. 



FAMILY— ZONITIDiE. 



Genus Zonites. 

 Subgenus Hyalina. — Ker. 



H. ARBOREA. — Say. 



Very common under logs, etc., in woods. Also found fos- 

 sil in the Loess. 

 H. NiTiDA. — Muell. 



Not as common as the preceding. Found in rather low, 

 moist places. 

 H. RADiATULA. — Alder. 



Common under leaves and sticks, on creek and river bot- 

 tom lands. Also fossil in the Loess. This is commonly called 

 H. viridula. and H. cellaria. 



H. iNDENTATA. — Say. 



Found both in low, damp places and on rocky hillsides. 



Subgenus Pseudohyalina. — Morse. 

 P. MiNUSCULUS, Binn. 



Very common, ^ccurs both in high rocky places and in 

 low swamps. 

 P. LiMATULA. — Ward. 



Living specimens of this species have not been found in 

 Iowa, but a form referable to it occurs quite commonly in the 

 Loess. 



