56 



LIFE OF I FE PLEISTOCENF 



BIOLOGICAL REMAINS 



Stratum II 

 Plants 



Potamogelon 



Pisidium comprcsstim 

 " splcndididum 

 " mainense 



Valvata tricarinata 



Amnicola limosa 

 " lustrica 



Goniobasis livescens 



Campeloma integrum 



Physa integra 



warreniana 



Valvata tricarinata 

 Amnicola limosa 

 " lustrica 

 Physa gyrina 

 Scgmcnlina armigera 

 Planorbis exactions 



Odocoilens virginianus 

 Fiber zibethicus 



Animals 



Segmentina armigera 

 Planorbis antrosus 



campanidatus 



defleclus 



exacucnis 



parvus 



trivolvis 

 Galba reflexa 

 " obrussa 

 Lymnaea stagnalis appressa 

 Sutcinea avara 



Stratum III 

 Mollusca 



Planorbis parvus 



Vcrtebrata 



" trivolvis 

 Galba obrussa 



" obrussa decampi 



" reflexa 

 Lymnaa stagnalis appressa 



i 



Portion of skull 

 Skull 



Lincoln Park property, Lemont, edge of Dcsplaincs Rher. Surface 590 feet A.T. 



Strata 



Deposit 



Depth 



Remarks 



V 



Black loam 



28 

 12 

 37 

 58 

 + 



135 





IV 



Black earth, carbonaceous 





III 



Brown soil with shells 





II 



Sticky blue clay 





I 



Niagara limestone 







Total thickness.... 





E. THE CALUMET-SAG CHANNEL (PLATE XXV) 



The Calumet-Sag channel of the Chicago drainage system extends from the 

 Little Calumet River half a mile west of Halsted Street, to the sanitary ship 

 canal about a mile west of Lambert Station (technically from the westerly 



