55 



29. — Margaritana marginata, Say. Tr. I, i, 40 ; iii, 54. 



30.— " undulata, Say. Tr. I, i, 40 ; iii, 54 ; Ot. Nat. I, 



114; III, 66. 

 31. — " rugosa, Barnes. Tr. I, i, 40 (as costata) ; iii, 54. 



32. — Anodonta edentula, Say. Tr. 1, iii, 55. 



33.— " undulata, Say. Tr. I, i, 40 ; iii, 55 ; Ot. Nat. I, 114 ; 



III, 66. 

 34. — " subcylindracea, Lea. Tr. I, iii, 55. 

 35.— " Benedictii, Lea. Tr. I, iii, 55 j II, 266. 



36. — " Lewisii, Lea. Tr. I, iii, 56. 



37. — " implicata, Say. Tr. I, iii, 56. 

 38. — " Footiana, Lea. Tr. I, iii, 56. 



39._ " lacnstris, Lea. Tr. I, iii, 56 ; II, 265. 



40.— " fragilis, Lam. Tr. I, iii, 56 ; iv, 74 ; II, 265. 

 41. — " fluviatilis, Dillwyn. Tr. I, i, 40 (as cataracta) ; iii, 



56 j II, 263, Ot. Nat. Ill, 66. 



B. —Freshwater Univalves. 



42.— Canipelonia decisum, Say. Tr. I, i, 39 ; II, 132, 263, 265, 266' 



43. — Valvata tricarinata, Say. Tr. I, i, 39 ; II, 263. 



44.— " sincera, Say. Tr. I, i, 39 (as humilis) ; II, 264. 



45. — Amnicola porata, Say. Tr. I, i, 39 ; iii, 57 ; II, 265. 



46.— " pallida, Hald. Ot. Nat. IV. p. 53. 



47.— " limosa, Say. Tr. 1, iii, 57. 



48. — " Cincinnatiensis, Anth. Ot. Nat. IV. p. 53. 



49. — " granuni, Say. Tr. I, i, 39 ; iii, 57 (as Sayana, Anth.). 



50. — 1 Pomatiopsis lapidaria, Hald. Tr. I, i, 39. 



51. — Goniobasis livescens, Menke. Tr. I, i, 39 ; iv, 74. 



52. — Limnaea stagnalis, Linn. Tr. I, i, 39 ; II, 131, 263. 



53.—? " decollata, Mighels. Tr. I, i, 39. 



54._ « columella, Say. Tr. I, i, 39 ; II, 132. 



55. — " megasoma, Say. Tr. I, iii, 58; iv, 74. 



56. — " palustris, Miill. Tr. I, i, 39 (as elodes and umbrosa) ; 

 II, 264. 



57._ " catascopium, Say. Tr. I, i, 39 ; II, 264, 266. 



58.— " emarginata, Say. Tr. I, iii, 58 ; II, 264. 



59.— " caperata, Say. Tr. I, i, 39 ; II. 264. 



