258 
[ FEBRUARY, 
Unio stapes, Lea, 1832, iv.77, 7,8, Synopsis, 22. 
Con. Monog. 83, 46, 1. 
Fer. Guerin’s Mag. 1835, 28. 
Chenu, Conchy!l. Unio, pl. 15, fig. 5. 
stegarius, Raf. Ann. v.46, Poulson’s Trans. 51. 
Con. Monog. 83, 46, 1. 
Fer. Guerin’s Mag. 1835, 28. 
U. irroratus, Lez, 1852, iii. 269, 5,5, Synopsis, 22. 
Chenu, Conchyl. Unio, pl. 10, fig. 3. 
Stewardsonii, Lea, 1852, x. 278, 23, 36, Synopsis, 20. 
Stonensis, Lea, viii. 195, 8,5, Synopsis, 27. 
stramineus, Coz. Sillim. Journ. xxv. 339, 1, 6. 
Monog. 91, 50,1. 
Lea, Synopsis, 28. 
striatus, Lea, 1841, viii. 203, 12,16, Synopsis, 26. 
strigosus, Lea, 1841, viii. 198, 9,9, Synopsis, 36. 
Chenu, Conchyl. Unio, pl. 30, fig. 6. 
subinflatus, Coz. New Fresh Water Shells, Appendix, 1835, 5. 
Monog. 97, 54, 1. 
U. Hopetonensis ? Lea,1838, vi. 29,9, 24, Synopsis, 32. 
Chenu, Conchyl. Unio, pl. 20, 5. 
subplanus, Cor. Monog. 73, 41, 1. 
Lea, Synopsis, 33. 
subrotundus, Raf. (young) Ann. 42, Poulson’s Trans. 44. 
Say, Amer. Conch. Synonym. of Unio, No. 32. 
Fer. Guerin’s Mag. p. 28. 
U. striatus, Raf. (old} Ann. v.45, Poulson’s Trans. 50. 
circulus, Lea, ili. 433,9, 14, Synopsis, 34. 
Chenu. Conchyl. Unio, pl. 16, fig. 1. 
subtentus, Say, Journ. Acad. Nat. Sc. v. 130, Amer. Conch. pl. 15. 
Con. Sillim. Jour. xxv. 339, 1, 4, Monog. 85, 47, 1. 
Fer. Guerin’s Mag. 1835. 
Lea, Synopsis, 21. 
subrostratus, Say, Disseminator, 1830. 
U. iris, Lea, iii. 439, 11, 18, Synopsis, 38. 
Chenu, Conchyl. Unio, pl. 8, fig. 7. 
symmetricus, Lea, 1845, x. 73,4, 11, Synopsis, 32. 
Tampicoensis, Lea, vi. 24,7, 18, Synopsis, 26. 
Chenu, Conchyl. Unio, pl. 21, fig. 5. 
teniatus, Con. New Fresh Water Shells, 26, 4, 2. 
U. pulcher, Lea, vi. 6, 3,6, Synopsis, 28. 
Chenu, Conchyl. Unio, pl. 17, fig. 2. 
Taitianus,*Zea, 39,4,11, Synopsis, 25. 
Tecomatensis, Lea, 1841, viii. 234, 21, 48, Synopsis, 27. 
Chenu, Conchyl. Unio, pl. 31, fig. 6. 
Tennesseensis, Lea, 1842, viii. 199, 10,11, Synopsis, 27. 
Chenu, Conchy]. Unio, pl. 27, fig. 1. 
tener, Lea, 1842, viii. 198,10, 10. Synopsis, 28. 
Chenu, Conchyl. Unio, pl. 31, fiz. 1. 
tenerus, Ravenel, Lea, 1834, v. 63, 9,2. Synopsis, 39. 
U. tenebrosus, Coz. New Fresh Water Shells, 42, 7, 1. 
tetralasmus, Say, Amer. Conch. pl. 23. 
Lea, Synopsis, 32. 
