218 AMERICAN JOURNAL 



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



present somewhat uncertain. 



17. " cylindricus, Say. 



18. " dolabelloides, 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. " foUatus, 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. " Haysianus^ Lea. U. Sotverbyanus, Lea, is^ no doubt, 



a sexual counterpart. 

 '60. " Hohtonensis, Lea. A single specimen, apparently 

 this species, is all that has been found. 



31. " intermedius, 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. " patidus, Lea. A single specimen. 



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

 s^Jialler in the Holston River. This remark does not apparently apply 

 with more force to ehemis than to several other species. 



