10 

 ALLUVIUM (shell-marl deposit.) 



Gasteropoda. 



Ainnicola porata, Say. 

 Conulus fiilvus, Draparnaud. 

 Hyiilii)a ai-borea, Say, 



" indentata, Say. 

 Lirunsea desidiosa? Say. 



" galbana, Say. 



" stagnalis, Linnaeus. 

 Mesodon albolabris, Say. 



" " var. dentifera, Binney. 



'' Sayii, Binney. 

 Patula alternata, Say. 

 Ph vsa heterostroplia, Say. 

 Planorbis bicarinatus, Say. 



" campanulatns, Say. 



" ~ {)iirvus, Say. 

 Valvat tricarinati), Say. 



