50 FRANK COLLINS BAKER 



Feet 



4. Gray silt (modern) i 



3. Black, peaty soil, fossiliferous \\ 



2. Gray silt, compact I4 



I. Fine gravel, cross-bedded to water level i 



Stratigraphic horizon of No. j: Wabash stage (pre-Recent). 



MOLLUSCAN LIFE 



Ten species of both land and fresh-water mollusca occurred in 

 this peat deposit, as noted: 



Water Land 



Pisidium, species, a few odd valves. Carychium exile, rare. 



Physa gyrina, rare. Vitrea rhoadsi, rare. 



Aplexa hypnoriim, rare. Gastrocopta tappaniana, common. 



Planorhis urbanensis, not common. Strohilops virgo, rare. 



Galba dalli, common. Euconulus fulvus, rare. 



This is a typical swamp or small-pond fauna such as might be 

 found in any quiet pond in Illinois. Such small bodies of water 

 are common in old flood plains. The presence of Planorhis urban- 

 ensis is noteworthy, the species being hitherto known only from 

 the original locality at Urbana. 



STATION NO. II 



Same as Station No. 3. 



STATION NO. 12 



Locality: Stephenson County, Sec. 22, T. 29 N., R. 6 E., about 

 100 feet southeast of the fork of the roads \ mile northwest of 

 Winslow, east side of road; roadcut 7 feet deep, all grassed except 

 i^ feet at base. 



Material: Probably entirely loess. Base shows loess inter- 

 stratified with sand: yellow, fossiliferous. 



Stratigraphic horizon: Not precisely known, although post- 

 Illinoian. 



MOLLUSCAN LIFE 



The mollusk Succinea vermeta appears sparingly in the base of 

 the section. 



