419 



Viviparidac 



Vivipara contcctoidcs W. G. Biniiey 



Fivipara suhpurpurca Say 



Lioplax subcariiiatus (Say) 



Canipcloiiia sitbsoliiiiiin Anthony 

 Pleuroceridae 



Goniobasis livcscciis Menke 

 Ancylidae 



A lie yl us species 

 Aninicolidae 



Aiiinicola cmarginata Kiister 



Amnicola lustrica Pilsbry 

 Valvatidae 



Valvata tricarinata (Say) 

 Planorbidae 



Planorbis parvus Say 

 Fori f era 



Unidentified fresh-water sponges, at least one 

 species. 

 Crustacea 

 Isopoda 



Ascllus iufcniicdius Forbes 



3. Illinuis River, Liverpool to Havana inelusive. Sixt\- 

 nine species; 55 collections; all cones combined. 



Mollusca 

 Unionidae 



Anodonta corpulenta Cooper. Young 



Anodonta iinbecillis Say 



Lainpsilis lutenlus (Lamarck). Young 



Laiiipsilis fallaciosus Simpson, Young 



Lampsilis parvus Barnes 



Plagiola donaciformis Lea 

 Sphaeriidae 



Sphacriuni stainineuui Conrad 



Sphaeriuut striatinuni Lamarck 



Spliaeriuni simile Say 

 Viviparidac 



Vivipara conteetoides W. G. Binney 



Vivipara subpurpurea Say 



Campeloma dccisum Say 



Lioplax subcarinatus (Say) 

 Pleuroceridae 



Goniobasis livescens Menke 



Pleurocera clevotum, var. lewisii Lea 

 Amnicolidac 



Soniatofjynis subglobosus (Say) 



