248 [February, 



Unio Cuvierianus, Lea^ 1852, x. 263, 16, 16, Synopsis 32. 



cyphius, Raf.y Poulson's Trans. 39, v. 59. 



Co7i. Mouog. 113,63. 



U. ^sopus, Green, Contributions to Maclurian Lyceum, i. 46, 3. 



Lea, Synopsis, 23. 

 Cylindricus, Say, Nicholson's Enc. pi. 4, fig. 3. 



U. naviformis. Lam., An. vi. 75, Desk. ed. 537. 



Elliptio solenoides, Raf., Ann. v. 32, Poulson's trans. 26. 



Theliderma cylindrica. Swains., Malac pi. 271, iig. 54. 



U. cylindricus, Hildreth, Silliman's Journ. xiv. 283, fig. 13. 

 Lea, Synopsis, 23. 



Cyrenoides, Phillipi, Conchyl. 1848, 11, 5, 1. . 



Lea, Synopsis, 25. 



dactylus, Lea, 1841, viii. 196, 7, 7, Synopsis 36. 



Chenu, Conchyl. Unio, pi. 30, fig. 5. 

 Dariensis, Lea, 1841, viii. 246, 26, 61, Synopsis 33. 



Chemi, Conchyl. Unio, pi. 33, fig. 6. 



decisus, Lea, 1832, iv. 92, 12, 23, Synopsis 26. 

 Con. Monog. 3, 2, 6. 

 Kust. Chem. Unio pi. 7, fig. 3. 

 Chenu. Conch. Unio pi. 18, fig. 3. 

 Fer. Guerin's Mag. 28. 



declivis, Say.^ Transylvania Journ., Dec. 1831, iv. 527. 

 American Conch, pi. 35. 

 U. geometricus, Lea, 1834, v. 38, 4, 10, Synopsis 33. 

 Desk. Lam. An. sans Vert. vi. 556. 



delumbis. Con., New Fresh Water Shells, May, 1834, 35, 5, 3. 



U. modioliformis. Lea, Aug. 1834, v. 97, 13, 40. 

 decoratus. Lea, 1852, x. 257, 13, 6, Synopsis 19. 

 dilatatus, Raf.y (Elliptio) Ann., v. 31, Poulson's Trans. 25. 

 Con. Monog. 42, 21. 



U. cuprea, Raf., (young) Ann. 38, 81, 8, 9. 



U. atroviolacea, Raf., (obiiquaria) Ann. v. 55. Poulson's trans. 69. 

 U. nasutus, Lavn. not Say, An. sans Vert. vi. 538. 



Illustrated ed. Cuvier's Regne Animal. Moll. 92, 2. 

 U. gibbosus, Barnes, Sillim. Journ. 1823, vi. 262. 

 U. arctior ? Lea, (young) Synopsis, 38, vi. 10, 4, 10. 

 Chenu, Conchyl. Unio, 33, 2. 

 discus, Lea, 1838, vi. 74, 18, 57. Synopsis 31, 



Chenu, Conchyl. Unio, pi. 19, fig. 6. 

 dolabraetormis, Lea, 183S, vi. 103, 24, 113, Synopsis 27. 



Chenu, Conchyl. Unio, pi. 23, fig. 6. 

 *dolabelloides. Lea, 1842, viii. 215, 15, 31, Synopsis 35. 



Chenu, Conchyl. Unio, pi. 29,fi^. 4. 

 Dorfeuillianus, Lea, 1838, vi. 73, 17, 54, Synopsis 22. 

 Chenu, Conchyl. Unio, pi. 25, fig. 5. 



dromas. Lea, 1834, v. 70, 10, 29, Synopsis 23. 



Con. Monog. 84, 46, 2. 



U. caperatus. Lea, 1845, x. 75, 5, 14. 

 Duttonianus, Lea, 1841, viii. 236, 22, 50, Synopsis 35. 



Chenu. Conchyl. Unio, pi. 32, fig. 4. 

 Edgarianus, Lea, 1841, viii. 214, 15, 30, Synopsis 25. 



Chenu. Conchyl. Unio, pi. 29, fig. 5. 

 Eastbrookianus, Lea, 1845, x. 77, 6, 17. Synopsis 40. 

 exiguus. Lea, 1842, viii. 191, 7, 1, Synopsis 27. 



C/te/m. Conchyl. Unio, pi. 30, fig. 1. 



