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Unio excultus, Con., Monog. 99, 55, 1. 
U. declivis, Lea, (not Say,) Synopsis 33. 
famelicus, Gould., Lea, Synopsis 31. 
fasciolaris, Raf., Ann. v. 37, Poulson’s Trans. 36. 
Fer. Guerin’s Mag. 1835, 27. 
Say. Amer. Conch. Syn. No. 20. 
U. phaseolus, Hildreth, Sillim. Journ. xiv. 283. 
Lea. Synopsis, 38. 
U. sinuatus, Raf., (very old) Ann. v.55. 
U. mucronatus, Barnes, Sillim. Journ. vi. 266, 13, 13. 
U. planulatus, Lea. iil. 431, 9, 13. 
Chenu. Conchyl. Unio, pl. 13, fig. 1. 
U. cuneatus, Barnes, (white var.) Fresh Water Shells, Sillim. 
Journ. note to Hildreth, xiv. 283. 
U. phaseolus, Say., Amer. Conch. pl. 22. 
U. planulata, Desh., Lam. vi. 549. 
U. camelus, Lea, (old) 1834, v. 102, 15, 45. 
fasciatus, Aznz., Poulson’s Trans 28. 
Say. Amer. Conch. Syn. of Unio, No. 6. 
Fer. Guerin’s Mag. 1835, 27. 
Con. Monog. 3, 1. 
U. Crassus ? Say, Nicholson’s Encye. pl. 1, fig. 3. 
U. carinatus, Barnes, Silliman’s Journ. vi. 126. 
U. ellipticus, <« ec 259, 13, 19. 
Hildreth, 03 XIV. 278. 
fasciolus, Raf., Ann. v.83, Poulson’s Trans. 28. 
U. subangulatus, Lea, x. 209, 13, 23. 
- fatuus, Lea, viii. 201,11, 14, Synopsis, 38. 
Chenu. Conchyl. Unio, pl. 31, fig. 4. 
Fisherianus, Lea, 1838, vi. 8, 4, 8, Synopsis 37. 
Chenu. Conchyl. Unio, pl. 20, fig. 4. 
U. nasutus, var. Con., not Say, Monog. 38, 18, 1. 
flavescens, Lea, 1845, x. 72, 3,9, Synopsis 27. 
flavus, Raf., Ann. v.39, Poulson’s Trans. 38. 
Con. Monog. 174, 41, 2. 
Fer. Guerin’s Mag. 1835, 27. 
Say. Amer. Conch. Syn., No. 22. 
U. rubiginosus, Lea, 1832, ili. 427, 8, 10, Synopsis 24. 
Chenu, Conchyl. Unio, pl. 13, fig. 4. 
flexuosus, Raf. Ann. v.40, Poulson’s Trans. 41. 
Con. Monog. 8, 4, 2. 
Say. Amer. Conch. Syn., No. 27. 
U. foliatus, Hildreth, Sillim. Journ. xiv. 284, 16. 
Lea. Synopsis, 20. 
Floridensis, Lea, 1852, x. 274, 21,31, Synopsis 39. 
folliculatus, Lea, 1838, vi. 38, 11, 33, Synopsis 35. 
Chenu, Conchyl. Unio, pl. 23, fig. 4. 
Forbesianus, Lea, 1852, x. 264, 16,17, Synopsis 24. 
U. congareus? Lea. . 
Foremanianus, Lea, 1841, viii. 247, 27, 64, Synopsis, 23. 
Chenu, Conchyl. Unio, pl. 26, fig. 1. 
fragosus, Con., Monog. 12, 6, 2. 
Lea, Synopsis, 22. 
fraternus, Lea, 1852, x. 263, 16,15, Synopsis, 32. 
fulgidus, Lea, 1845, x. 73, 4,10, Synopsis, 25. 
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