OF CONCHOLOGY. 



167 



MARGARITANA, Schum. 



43. M. Holstonia, Lea. 



ANODONTA, Lam. 



44. A. Showalterii, Lea. 



ANCULOSA, Say.* 



45. A. ampla, Anth. 



UNIO, Brug. 



1. U. acutissimus, Lea. 



2. " arctatus, Lea. 



3. " asperatus, Lea. 



4. " atro-costatus, Lea. 



5. " Blandianus, Lea. 



6. " Boykinianus, Lea. 



7. " consanguineus, Lea. 



8. " cornutus, Barnes. 



9. " decisus, Lea. 



10. " decumbens, Lea. 



11. " dolosus, Lea. 



12. " excavatus, Lea. 



13. " fibuloides, Lea. 



14. " germanus, Lea. 



15. " glandaceus, Lea. 



16. " Foremanianus, Lea. 



17. " Hartmanii, Lea. 



18. " interventus, Lea. 



19. " Johannis, Lea. 



20. " lens, Lea. 



21. " Lewisii, Lea. 



22. " medius, Lea. 



23. " metanever, Raf. 



24. " metastriatus, Lea. 



25. " nucleopsis, Con. 



26. " ornatus, Lea. 



27. " parvulus, Lea. 



28. " pauperculus, Lea. 



29. " penitus, Con. 



30. " perovalis, Con. 



31. " 'i perplicatus, (7o7i.* 



32. " plancus, Lea. 



33. " porphyreus, Lea. 



34. " pulvinulus. Lea. 



35. " pustulosus, Lea. 



36. " pyramidatus, Lea. 



37. " rubidus, Lea. 



38. " Showalterii, Lea. 



39. " stabilis. Lea. 



40. " trinacris, iea. 



41. " unicolor, Lea. 



42. " verus, Lea. 



•■Possibly atro-costatus, Lea. 



* The genera of the Univalves are alphabetically arranged. 



ANCYLUS, Geoffroy. 

 55. A. elatior, Anth. 



