OP CONCHOLOGY. 69 



34. Menetus exacutus, Say. 



35. Gykaulus deflectus, Say. 



36. '•' PARVUS, Say. 



37. Planorbula armigera, Say. 



38. Ancylus rivularis, Say. 



STREPOMATID^. 



39. Pleurocera subulare, Lea. 



40. GoNiOBASis livescens, Menke. 



VIVIPARID^E. 



41. Melantho subsolida. Anthony. 



42. " INTEGRA, Say. 



43. YlVIPARA INTERTEXTA, Say. 



44. LioPLAX SUBCARINATA, Say. 



AMNICOLIDJE. 



45. SoMATOGYRA isoGONA, Say. 



46. " DEPRESSA, Tryon. 



47. Amnicola CiNCiNisrATiENSis, Anthony. 



48. " Sayana, Anthony. 



49. POMATIOPSIS LAPIDARIA, Say. 



YALYATIDtE. 



50. Yalvata tricarinata, Say. 



UNIONID^. 



51. AisroDONTA coRPULENTA, Cooper. 



52. " GRANDis, Say. 



53. " iNBECiLis, Say. 



54. "■ SUBCYLINDRACEA, Lea. 



55. " UNDULATA, Say. 



56. Margaritana complanata, Bar. 



57. " HiLDRETHiANA, Lea. 



58. " MARGINATA, Say. 



59. " EUGOSA, Bar. 



60. Unio aesopus, Green. 

 \ 61. " ALATUS, Say. 



62. '' ANODONTOiDES, Lca, 



63. " ASPERRiMUS, Lea. 



64. " CAPAX, Green, 



65. "■ CORNUTUS, Bar. 

 QQ. " CRASSIDEXS, Lam, 



67. ^' DiSTANS, Anthony, Mss. 



68. "■ DoRFEUiLLiANUS, Lea. 



69. " EBEisrus, Lea. 



70. '' ELEGANS, Lea. 



71. " ELLIPSIS, Lea, 



72. " FRAGOSUS, Conrad. 



