Con. Mon., p. 78, pi. 44, f. 1. 

 Ts. Am. P.S., v.4, pi. I7,f. 44. 

 Ts. Am. P. S., v. 6, pi. 4, f. 10. 

 Ts. Am. P. S., v. 4, pi. 9, f. 15. 

 Ts. Am. P. S., v. 4, pi. 5, f. 3. 

 Ts. Am. P. S., v. 3, p. 426, pi. 7. 

 Rossm., pi. 9, f. 133. 

 Swains. Z. III., Istser., pi. 171. 

 Ts. Am. P. S., v. 10, pi. 2, f. 5. 

 Rossm., Icon., pi. 15, f. 206, 207. 

 Phil. Icon., v. 3, pi. 4, f. 1. 

 Voy. Coquille, pi. 15, f. 5. 

 ChenuC. 111., pi. 11, f. 4. 

 Drap. Moll., pi. 10, f. 17-19. 

 Mich. Supp., pi. 16, f. 25. 

 Pfeiff. Syst. An. pi. 5, f. 14. 

 Wood's Gen. C., pi. 19, f. 1, 2. 

 Don. B. Shells, v. 5, pi. 174. 

 Rossm. Icon., pi. 15, f. 20. 

 Rossm., pi. 8, f. 128. 

 Rossm., pi. 15, f. 208. 

 Ts. Am. P. S., v. 6, pi. 2, f. 3. 

 Ts. Am. P. S., v. 8, pi. 9, f. 8. 

 Chenu C. 111., pi. 30, f. 7. 

 Ts. Am. P. S.,v. 5, pi. 15, f. 44. 

 Ts. Am. P. S, 18, pi. 16, f. 32. 

 Sowb. Gen., f. 4. 

 Enc. Meth., pi. 248, f. 2. 

 Crouch. Intr. C., pi. 9, f. 3. 

 Ts. Am. P. S., v. 4, pi. 6, f. 6. 

 Conr. Mon, p. 82, pi. 45, f. 2. 

 Ts. Am. P. S.,v.6,pl. 17, f. 54. 

 Ts. Am. P. S., v. 5, pi. 3, f. 9. 

 Conr. Mon., p. 79, pi. 44, f. 2. 



Unio asper, Lea. 

 is Unio nexus, Say. 

 Unio dilatatus ! Raf. 

 is Unio apiculatus, Say. 

 is Unio quadrulus, Raf. 

 is Unio purpuratus, Lam. 

 is Unio batavus, Lam. 

 Niaa fragilis, Swains. 



Niaa aurata, Swains. 

 Unio depressus, Less. 

 Unio obtusus, Fer. 

 is Unio crassissimus, Fer. 



Unio ater, Nils. 

 Mysca batava, Turt. 

 Mya ovalis, Soland. 

 Unio gibba, Miihlf. 

 Unio Labacensis, Miihlf. 

 Unio consentaneus, Ziegl. 



is Unio olivarius, Raf. 

 is Unio littoralis, Lam. 

 is Unio politus, Say. 

 is Unio interruptus, Rat. 

 Unio pustulosus, Lea. 

 Unio Dorfeuillanus, Lea. 

 Unio Schoolcraftensis, Lea. 

 Unio prasinus, Conrad. 



Ts. Am. P. S., v. 5, pi. 10, f. 27. 

 Silliman's Jour, v. 25, pi. 1, f. 2. 

 Ts. Am. P. S, v. 4, pi. 13, f. 25. 

 Ts. Am. P. S, v. 8, pi. 23, f. 54. 



Ts. Am. P. S, V. 5, pi. 15, f. 45. is Unio fasciolariB, Raf. 



Amer. Conch, pi. 42. 



Conr. Mon, p. 75, pi. 42. Unio globosus, Lea. 



Ts. Am. P. S, v. 5, pi. 4, f. 12. 



Cat. de Corse, p. 66, pi. 2, f. 4. Unio pictorum ? var. 

 Ts. Am. P. S, V. 5, pi. 2, f. 2. is Unio personatus, Say. 



Ts. Am. P. S, v. 5, pi. 2, f. 4. 



