256 [February, 



Unio purpiiriatus, Sayy Disseminator, 1829. 



U. Medellinus, Lea, 1838, vi. 39, 12, 34, Synopsis, 29. 

 Chemi, Conchyl. Unio, pi. 17, fig. 6. 



pusillus. Lea, viii. 220, 18, 36, Synopsis, 31. 

 Chemi, Conchyl. Unio, pi. 32, fig. 5. 



pygmcEUs, Lea, x. 262, 15, 14, Synopsis, 31. 



quadrulus, (w) Raf. Ann. v. 41, Poulson's Translation, 42. 

 Say, Amer. Conch, pi. 53. 

 Con. Monog. 112,62. 



U. asperrimus. Lea, iv. 71, 5, 3, Synopsis, 21. 

 Chenu, Conchyl. Unio, pi. 9, fig. 2. 



U. lachrymosus. Lea, iii. 272, 6, 8, (young) pi. 15, fig. 6, Synop. 21. 

 Chenu, Conchyl. Unio, pi. 15, fig. 6. 



radiatus, Lam. Desk. An. sans Vert. vi. 535. 

 Mya radiata, Gmel. vide Lam. 

 Mya, Schrot. Eil. 614. 

 Mya radiata, Dillwyn, Cat. 1. 51. 

 Mya pictorum tenuis, Chemn. vi. 23, 2, 7. 

 U. Virginiana, Lam. Desk. An. sans Vert. vi. 544. 

 Delassert, Recueil de Coquilles, pi. 13, fig. 4. 

 Mya oblongata, Wood. Supplement to Index Test. pi. 5, fig. 2. 



Conchyl. pi. 12, fig. 4. 

 U. ochraceus. Desk, (not Say,) ed. Lam. vi. 536. 

 U. radiatus, Con. Monog. 24, 10, 2. 

 Lea, Synopsis, 29. 



DeJ^ay, Zool. of New York, 189, 18, 236. 

 Gould, Invert, of Mass. 110. 

 Lampsilis radiata, ^^a^.MSS. Stimpson's Shells of New Eng. 13. 



*Rangianus, Lea, 1838, vi. 85, 18, 56, Synopsis, 2C. 



Chenu, Conchyl. Unio, pi. 24, fig. 5. 

 Raveneli, Con. New Fresh Water Shells, May, 1834, 39, 6, 4. 



U. confertus. Lea, Aug. 1834, v. 103, 16, 47, Synopsis, 30. 



U. Watereensis, Lea, Aug. 1838, v. i. 130, note, Synopsis, 33. 



rectus. Lam. An. sans Vert. vi. 74, Desh. ed. 537. 

 Con. Monog. 33, 15. 



U. latissima, (Elliptic,) iSa/. Ann. v. 31, Poulson's Trans. 25. 

 U. praelongus, Bariies, Sillim. Journ. vi. 261. 

 U. rectus, Kust. Chemn. Conchyl. 35, 6, 1. 

 Lea, Synopsis, 35. 

 Eurinea praelonga, Agas. MSS. Stimpson^s Shells of New Eng. 13. 



Reevianus, Lea, 1852, x. 272, 20, 28, Synopsis, 28. 



reflexus, Raf. Ann. v. 40, Poulson's Trans. 40. 



Con. Monog. 7,4, 1. 



Fer. Guerin's Mag. 1835, 28. 



Soy, Synonym, of Unio, No. 25. 



Ktist. C\iexnn. Unio, pi. 11, fig. 2. 



U. cornutus, Barnes, Sillim. Journ. vi. 122. 



Lea, Synopsis, 22. 

 regularis, Lea, 1841, viii. 243, 25, 59, Synopsis, 29. 



Chenu, Conchyl. Unio, pi. 33, fig. 3. 



retusus. Lam. Desh. An. sans Vert. vi. 534. 

 Fer. Guerin's Mag. 1835, 28. 

 Say, Amer. Conch. Synonym, of Unio, No. 26. 

 Con. Monog. 1, 19, 8. 

 Lea, Synopsis, 35. 



U. torsa, Raf. Ann. v. 45, 82, 1, 2, 3, Poulson's Trans. 40. 

 Kust. Chemn. Conchyl. Unio, pi. 13, fig. 2. 

 U. obtusa, Cuv. Regne Animal, illust. edit. pi. 92, fig. 1. 



