*9*3.] ORTMANN— THE ALLEGHENIAN DIVIDE. 311 



4. Symphyiiota costata (Raf.) 



5. Alasmidonta minor (Lea) 



6. Alasmidonta fabula (Lea) 



7. Alasmidonta marginata (Say) 



8. Strophitus edentulus (Say) 



9. Ptychobranchus subtentns (Say) 

 10. Nephronaias perdix (Lea) 



*ii. Nephronaias copei (Lea) 



12. Medionidiis conradicus (Lea) 



13. Enrynia nebulosa (Conr.) 

 *I4. Enrynia dispansa (Lea) 



15. Enrynia vanuxemensis (Lea) 



16. Lampsilis ovata ventn 'cosa (Barn.) 



17. Lampsilis mnltiradiata (Lea) 



Clinch, in Tazewell Co. 



1. Fusconaia bursa-pastoris (Wright) 



2. Fusconaia sp.? 



3. Quadrula cylindrica strigillata (Wright) 



4. Pleurobema (probably 2 species) 



5. Elliptio dilatatiis (Raf.) 



6. Symphynota holstonia (Lea) 



7. Symphynota costata (Raf.) 



8. Alasmidonta minor (Lea) 



9. Alasmidonta marginata (Say) 



10. Strophitus edentulus (Say) 



11. Ptychobranchus subtentus (Say) 



12. Medionidus conradicus (Lea) 



13. Enrynia perpurpurea (Lea) 



14. Enrynia nebulosa (Conr.) 



15. Enrynia planicostata (Lea) 



16. Lampsilis ovata ventricosa (Barn.) 



17. Lampsilis mnltiradiata (Lea) 



18. Truncilla haysiana (Lea) 



19. Truncilla capsaeformis (Lea) 



These are altogether about 26 species, of which only 6 have 

 occurred in our previous lists {Elliptio dilatatus, Symphynota cos- 



