608 ORTMANN—NAYADES OF 
Emory River, Harriman, Roane Co., Tenn. 
~—according to Pilsbry & Rhoads; ,=Carn. Mus. (Ortmann, 
May 16, ’I5). 
ty1. Fusconaia cuneolus tr10. Toxolasma lividum 
to. F. barnesiana tumescens tir. Medionidus plateolus 
+3. Amblema plicata costata 12. Eurynia perpurpurea 
+4. Pleurobema oviforme 713. E. nebulosa 
ts. P. oviforme holstonense t14. E. vanuxemensis 
6. Elliptio niger ~(seen) +15. Lampsilis virescens 
t}7. E. dilatatus 716. L. ovata ventricosa 
8. Lasmigona costata (seen) 17. L. fasciola 
tto. Ellipsaria fasciolaris 718. Truncilla turgidula 
Houston DRAINAGE. 
(HEADWATERS. ) 
Little Mocassin Creek, Gate City, Scott Co., Va. 
Carn. Mus. (Ortmann, May 16, ’13). 
1. Lasmigona badia 2. Eurymia vanuxemensis 
Big Mocassin Creek, Willow 2s Russell Co., Va. 
Walker coll. 
1. Fusconaia barnesiana bigbyensis 2. Pleurobema oviforme argenteum 
Big Mocassin Creek, Mocassin Gap, Scott Co., Va. 
Carn! Mus. (Ortmann, May 16, ’13; Sept. 9, 715). 
1. Fusconaia cuneolus 9. Ellipsaria subtenta 
2. F. barnesiana 10. Medionidus plateolus 
3. F. barnesiana Bee 11. Eurynia nebulosa 
4. Ouadrula cylindrica 12. E. vanuxemensis 
5. Pleurobemaoviforme argentewm 13. Lampsilis ovata ventricosa 
6. Alasmidonta minor 14. L. fasciola 
7. A. marginata 15. Truncilla capseformis 
8 
. Pegias fabula 
North Fork Holston River, Saltville, Smyth Co., Va. 
j= Carn. Mus. (Ortmann, Sept.17, “12)) 5) * = Carn, Muss (0; 
Avabeterson, jiile 20, -17 )c 
+*1. Fusconaia barnesiana bigbyensis +*3. Pleurobema oviforme argenteum 
+*2. Lexingtonia dolabelloides con- +4. Lasmigona costata 
radt +5. Alasmidonta minor 
