218 AMERICAN JOURNAL 



16. Unio cuneolus, Lea. Shells regarded as euneolus are at 



present somewhat uncertain. 



17. " cyliiidricus, Say. 



18. " doIabeUoides, Lea. Mr. Lea changes the orthography 



in recent references to this species. 



19. " dromas, Lea. 



20. " ebenus, Lea.* Among Miss Law's earlier shells were 



specimens regarded as ebenus, which at a later date 

 were identified as Lesueurianus, Lea, no doubt 

 synonymous. 



21. " Edgarianus, Lea. Not abundant. 



22. " elegans, Lea. 



23. " fabalis, Lea. 



24. " foliatus, Hildreth. Three specimens found at Little 



River Shoals at various times. 



25. " glaber, Lea. A rare species. 



26. " glans, Lea. " " " 



27. " gibbosus, Barnes. Common. 



28. " gracilis, Barnes. 



29. " Haysimtus, Lea. U. Sow erby anus, Lea, is, no doubt, 



a sexual counterpart. 

 80. " Holstonensis, Lea. A single specimen, apparently 

 this species, is all that has been found. 



31. " intermedins. Con. A common species in the Holston 



and Clinch Rivers. Besides the common form, I 

 have a single specimen which varies notably, and 

 which, if not abnormal, may prove to be a distinct 

 species. 



32. " iris. Lea. Two specimens, only, have been seen ; 



doubtfully identified. 



33. " irroratus, Lea. 



34. " Lesleyi, Lea. Not abundant. 



35. " ligamentinus. Lam. 



36. " metanever, Raf. 



37. " monodontus, Say. 



38. " Mooresianus, Lea. 



39. " multiradiatus. Lea. This, I think, includes U. per- 



radiatus, Lea. 



40. " mytiloides, Raf. Fide C. M. Wheatley. 



41. " ovatus, Say. 



42. " patulus, Lea. A single specimen. 



* Many of the species common in Ohio and other Western States are 

 smaller in the Holston River. This remark does not apparently apply 

 with more force to ebenus than to several other species. 



