1853.] 24.5 



Unio angustatus, Lea^ 1832, v. 114, 17 , 43. Synopsis 23. 

 Con. Monog. 98, 54, 2. 

 Chenu, pi. 14, fig. 1. 



, apiculatus, Say, New Harm. Dissem., 1829, Amer. Conch, pi. 22. 

 Con. Monog. 78, 44, 1. 

 hea, Synopsis, 22. 

 U. asper. Jay, not Lea, Jay's Catalogue, 55. 



approxinnus, Lea, 1845, x. 74, 5, 13. Synopsis 28. 



arctior. Lea, 1838, vi. 10, 4, 10, Synopsis, 38. 

 Chenu, Conchyl. Unio, 21, 2. 



arctatHs, Con., Sill. Jour., xxv. 340, 1, 9; New F. W. Shells, 36, 5, 4. 



Leoy Synopsis, 38. 

 arcus, Con., Sillinn. Jour. 1834, xxv. 340 1, 8. 



Lea, Synopsis, 38. 

 argenteus, iea, 1841, viii. 242, 25, 57, Synopsis, 26. 



Chenu, Conchyl. Unio, pi. 33, fig. 2. 

 asper, Lea, (o) 1832, iv. 85, 9, 15, Synopsis, 22. 



Chenu, Conchyl. Unio, pi. 15, fig. 4. 



U. apiculatus, var. Jay, Catalogue, No. 1496, 55. 



Barrattii, Lea, 1852, x. 256, 13, Synopsis, 37. 

 Barnesianus, Lea, 1838, vi. 31, 10, 26, Synopsis, 24. 

 Chenu, Conchyl. Unio, pi. 19, fig. 2. 



*biangulatus, Lea, 1841, viii. 197, 9, 8, Synopsis 38. 

 Chenu, Conchyl. Unio, pi. 30, fig. 7. 



Bighyensis, Lea, 1841, viii. 237, 22, 51, Synopsis 24. 

 Chenu, Conchyl. Unio, pi. 26, fig. 5. 



Binneyi, Lea, 1845, x. 77, 6, 18, Synopsis 29. 



Blandiniiianus, Lea, Aug. 18^, v. 101, 15, 44, Synopsis 33. 



Con. Monog. 46, 23, 3. 



Kust., Chemn. Unio, 36, 6, 2. 



Bournianus, Lea, 1841, Synopsis 25, viii. 213, 15, 28. 

 CheniL, Conchyl. Unio, pi. 28, fig. 2. 



Brumbyanus, Lea, 1841, viii. 245, 26, 62, Synopsis 31. 



Boydianus, Lea^ 1841, viii. 216, 16, 32, Synopsis 38. 

 Chenu, Conchyl. Unio, pi. 32, fig. 2. 



Buckleyi, Lea, 1846, ix. 276, 39, 2, Synopsis 30. 



Buddianus, Lea, 1846, ix. 277, 40, 4, Synopsis 32. 



buxeus, Lea, 1852, x. 261, 15, 13, Synopsis 29. 



bullatus,* Raf. Ann., Sept. 1820, v. 41. Poulson's Trans., 23. 

 Con., Monog. 82, 45, 2. 

 Ferussac, Guerin's Mag. 28. 



U. verrucosus albus, Hildreth, Sillim. Journ. xiv. 289. 

 U. pustulosus, Lea, 1832, iv. 76, 7, 7. Synopsis, 22. 

 Chena, Conchyl. Unio, pi. 18, fig. 2. 



capax. Green, Cab. of Nat. Hist. 1832, ii. 290. 

 Con., Monog. 75, 42. 

 Ferussac, Guerin's Mag. 1835, 26. 

 Symphynota globosa. Lea, 1834, iv. 153, 4, 12. 

 U. capax, Kust, Chemn. Unio, 21, 15, 3. 

 Lea, Synopsis, 27. 



caelatus. Con., Sillim. Journ. 1834, xxv. 338, 1, 2. 

 Lea, Synopsis, 20. 



* Say makes this species the same as Mya modulosa, Wood, which is very 

 different, and evidently not an American species. 



