UPPER TENNESSEE DRAINAGE. 595 
POWELL DRAINAGE. 
North Fork Powell River, Big Stone Gap, Wise Co., Va. 
Walker coll. (C. C. Adams, Sept. 4, 99). 
1. Fusconaia pilaris bursa-pastoris 4. Eurynia nebulosa 
2. F. barnesiana bigbyensis 5. Lampsilis fasciola 
3. Medionidus plateolus 
South Fork Powell River, Big Stone Gap, Wise Co., Va. 
*— Walker coll. (Adams, Sept. 4, 99); t=—= Carnegie Mus. 
(Ortmann, May 15 and Sept. 6, ’13). 
+1. Fusconaia pilaris bursa-pastoris +7. Alasmidonta minor 
+2. F. barnesiana +8. Strophitus edentulus 
*+3, F. barnesiana Pree +9. Ellipsaria subtenta 
+4. Lexingtonia dolabelloides con- *10. Toxolasma lividum 
radi *+11. Medionidus plateolus 
*tc. Pleurobema oviforme argen-  *f12. Eurynia nebulosa 
tewm +13. E. vanuxemensis 
+6. Lasmigona badia 
Powell River, Olinger, Lee Co., Va. 
Walker coll. (Adams, Sept. 5, ’99). 
1. Fusconaia pilaris bursa-pastoris 7, Lasmigona costata 
2. F. cuneolus 8. Alasmidonta marginata 
3. F. barnesiana bigbyensts 9. Ellipsaria subtenta 
4. Lexingtonia dolabelloides con- 10. Medionidus plateolus 
radi 11. Eurynia perpurpurea 
5. Pleurobema oviforme 12. E. nebulosa 
6. Elliptio dilatatus 13. Lampsilis ovata ventricosa 
Powell River, Dryden, Lee Co., Va. 
* — Walker coll. (Adams, Sept. 3, ’99) ; {=—=Carn. Mus. (Ort- 
mann, Sept. 7, 13). 
+1. Fusconaia pilaris bursa-pastoris +9. Alasmidonta marginata 
+2. F. barnesiana +10. Pegias fabula 
*+3. F. barnesiana bigbyensis +11. Strophitus edentulus 
*+4. Lexingtonia dolabelloides con-  *f12. Ellipsaria subtenta 
radi *+13. Medionidus plateolus 
+5. Pleurobema oviforme *+14. Eurynia nebulosa 
*+6. Elliptio dilatatus *+15, EH. vanuxemensis 
+7. Lasmigona badia +16. Lampsilis ovata ventricosa 
*78. L. costata *+17. L. fasciola 
