I9I3-] ORTMANN— THE ALLEGHENIAN DIVIDE. 309 



Clinch and Powell Rivers. However, to the west of these, on the 

 Allegheny Plateau, there are other rivers, tributary to the Ohio, the 

 fauna of which was hitherto entirely unknown. Since a quite dif- 

 ferent fauna turns up in the Tennessee, it would be surely interest- 

 ing to know something about these intermediate western rivers, and 

 for this reason I made several trips into this region, and was able 

 to collect the following data, first for the Levisa Fork of Big Sandy 

 River, at Prestonsburg, Floyd Co., Ky. 



1. Fusconaia subrotunda (Lea) 



2. Crenodonta plicata undulata (Barn.) 



3. Quadrula pustulosa (Lea) 



4. Quadrula tuberculata (Barn.) 



5. Elliptio crassidens (Lam.) 



6. Symphynota costata (Raf.) 



7. Ob ovaria cir cuius lens (Lea) 



8. Nephronaias ligamentina (Lam.) 



9. Amygdalonaias elegans (Lea) 



10. Proptera alata (Say) 



11. Eurynia recta (Lam.) 



12. Lampsilis ovata ventricosa (Barn.) 



In the Licking River, at Farmer, Rowan Co., Ky., I found : 



1. Crenodonta plicata undulata (Barn.) 



2. Quadrula pustulosa (Lea) 



3. Quadrula tuberculata (Barn.) 



4. Pleurobema obliquum coccineum (Conr.) 



5. Elliptio dilatatus (Raf.) 



6. Symphynota costata (Raf.) 



7. Anodonta grandis Say 



8. Strophitus edentulus (Say) 



9. Ptychobranchus phase olus (Hildr.) 



10. Ob ovaria cir cuius lens (Lea) 



11. Nephronaias ligamentina (Lam.) 



12. Proptera alata (Say) 



13. Lampsilis luteola (Lam.) 



14. Lampsilis ovata ventricosa (Barn.) 



