Dey Secs (FEeBRUARY, 
Unio ochraceus, Say, (hk) Nicholson’s Encyclopedia, iv. 4, 2, 8. 
Pectunculus fluviatilus, List. Conch. pl. 157, fig. 12. 
Mytilus fluviatilus, Gmel. Dillw yn Cat. 316. 
Symphynota ochracea, Lea, iil. 69. 
U. ochraceus, Con. Monog. 37, 17, 2. 
Gould, Invert. of Mass. 112, ee 
Dekay, Zool. of New York, 193, 19, 137, 138. 
U. rosaceus, (?) Con. (not Dekay) Jour. Ac. Nat. Sc. 2d ser. 275, 37, 5. 
Olivarius, Raf. Ann. v. Poulson’s Trans. 28. 
Fer. Guerin’s Mag. 1835, 28. 
arias U. ellipsis, Lea, iii. 268, 4, 4. Synopsis, 26. 
ee Chenu, Conchyl. Unio, pl. 18, fig. 1. 
Ogeecheensis, Coz. Journ. Acad. Nat. Sc. 2d ser. i. 275, 37, 3. 
oratus, Con. Jour. Acad. Nat. Sc. 2d ser. 276, 37, 6. 
orbiculatus, Hild. 1828, Sillim. Journ. xiv. 284, fig. 15. 
Lea, Synopsis, 28. 
U. abruptus, Say, Amer. Conch. pl. 17. 
U. crassus, Con. Monog. 34, 16. 
ovatus, Say, Nicholson’s Encyclopedia, IV. Tes) Do 
Lam. Anim. sans Vert. vi. 75. 
Con. Monog. 4, 2. 
Fer. Guerin’s Mag. 1835, 26: 
Kust. Chemn. Unio, 22, 3, 2. 
Lea, Synopsis, 24. | ii 
U. ventricosus, Desh. (not Barnes), Desh. ed. of Lam. vi. 538. 
U. subovatus, ib. (not Lea.) 
U. occidens, (?) ib. ib. 528. 
oviformis, Coz., New Fresh Water Shells, 46, 3, 6. 
Lea, Synopsis, 26. 
pallescens, Lea, 1815, x. 79,7, 20, Synopsis, 27. 
paliatus, Lea, 1845, x.79, 7,20, Synopsis, 33. 
paludicolor, Geuld, Proceed. Bost. 8. N. H. ili. 63. 
Lea, Synopsis, 33. 
papyraceus, Gowld, Proceed. Bost. S. N. H. i. 53. 
Lea, Syuopsis, 38. 
parvus, Barnes, Sillim. Journ. vi. 174. 
Con. Monog. 20, 9, 1. 
Philippi, Conchyl. 19, 1, 2. 
Lea, Synopsis, 31. 
paulus, Lea, viii. 213, 15, 29, Synopsis, 31. 
Chenu, Conchyl. Unio, pl. 27, fig. 5 
pectorosus, Con. New Fresh Water Shells, May, 1834, 37, 6, I. 
Monog. 25,11, 1. 
Kust. Chemn. Unio, pl. 4, fig. 2 
U. perdix, Lea, Aug. 1834, v.72, 11, 31, Synopsis, 26. 
U. biangulatus, Lea, viii. 197, 9, 8. 
pellucidus, Lea, 1845, x. 70, 2,6, Synopsis, 39. 
penitus, Con. New Fresh Water Shells, 33, 5, 1- 
Lea, Synopsis, 24. 
perovatus, Sillim. Journ. xxv. 338, 1, 3. 
Con. New Fresh Water Shells, 47,2, 3. 
Lea, Synopsis, 27. 
U. nux, Lea, xX. 283, 24, 43. 
perovalis," Coz. New Fresh Water Shells, 43, 2, 2. 
Lea, Synopsis, 27. 
pernodosus, Lea, 1845, x. 71, 3,8, Synopsis, 
