Appendix B continued. 



Table B4 . 

 Numbers of live mussels and clams taken in 50 

 0.5m samples on transect 9-8 from the fleeted area 

 of the Illinois River at Naples. 



Total 



Mean per S.D. 

 0.5 hi 



No. of Percent 

 samples occur- 

 in which rence 

 species 

 occurred 



Fusconaia f lava 

 Megalonaias gigantea 

 Amblema plicata 

 Quadrula guadrula 

 Quadrula pustulosa 

 Quadrula nodulata 

 Arcidens confragosus 

 Lasmigona complanata 

 Anodonta grandis 

 Anodonta imbecillis 

 Obliguaria reflexa 

 Truncilla truncata 

 Truncilla donaciformis 

 Leptodea fragilis 

 Proptera alata 

 Proptera laevissima 

 Lampsilis teres 

 Unidentified 



13 



0.260 



0.060 



0.565 



0.240 



20.0 



8.0 



Total Mussels 223 4.460 4.572 



Musculium transversum 



Corbicula fluminea 559 11.180 7.698 



52 



46 



50 



92.0 



100.0 



