254 [February, 



Unio ochraceus, Say, (Ji) Nicholson's Encyclopedia, iv. 4, 2, 8. 

 Pectunculus fluviatilus, List. Conch, pi. 157, fig. 12. 

 Mytilus fluviatilus, Gmel. Dillvvyn Cat. 316. 

 Symphynota ochracea. Lea, iii. 69. 

 U. ochraceus. Con. Monog. 37, 17, 2. 



(row/^, Invert, of Mass. 112, 71. 



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. 

 jper. Guerin's Mag. 1835, 28. 

 U. ellipsis, Lea, iii. 268, 4, 4. Synopsis, 26. 

 Chenu, Conchyl. Unio, pi. 18, fig. 1. 



Ogeecheensis, Con. 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, pi. 17. 

 U. crassus, Con. Monog. 34, 16. 



ovatus, Say, Nicholson's Encyclopedia, iv. 7, 2. 



Lam. Anim. sans Vert. vi. 75. 



Con. MonOfH'. 4, 2. 



Fer. Guerin's Mag. 1835, 26: 



Kust. Chemn. Unio, 22, 3,2. 



Lea, Synopsis, 24. 



U. ventricosns. Desk, (not Barnes), Desh. ed. of Lam. vi. 538. 



U. subovatus, ib. (notXea.) 



U. occidens, (?) ib. ib. 528. 



oviformis, Con., New Fresh Water Shells, 46, 3, 6. 



Lea, Synopsis, 26. 



pallescens. Lea, 1845, x. 79, 7, 20, Synopsis, 27. 



paliatus. Lea, 1845, x. 79, 7, 20, Synopsis, 33. 



paludicolor, Gcnld, Proceed. Bost. S. N. H. ii. 63. 

 Lsa, Synopsis, 33. 



papyraceus, GoiUd, Proceed. Bost. S. N. H. ii. 53. 



Lea, Synopsis, 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. 

 ChemL, Conchyl. Unio, pi. 27, fig. 5. 



pectorosus. Con. New Fresh Water Shells, May, 1834, 37, 6, I. 

 Monog. 25, 11, 1. 

 Kust. Chemn. Unio, pi. 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, x. 283, 24, 43. 



perovalis,'Co?^. New Fresh Water Shells, 43, 2, 2. 



Lea, Synopsis, 27. 

 pernodosusj Lea, 1845, x. 71, 3, 8, Synopsis, 



