14 University of Michigan 



S. A. C. IR. 



2g. Planorbis deflcctus Say * * 



40. Planorbis parvus Say * * 



41. Planorbis umbilicatellus Ckll. ? * 



42. Segmentina armigera (Say) * 



43. Scymcntina armigera (Say) var * 



44. Ancyhis parallelns C. B. Ads * * * 



45. Caiiipclonia dccisa (Say ) * * 



46. Campeloma milcsii Lea? * 



4j. Aumicola limosa (Say) * * * 



48. Lam psilis luteola (Lam.) * * 



49. Anodonta marginata Say * * * * 



50. Anodonta grandis gigantca Lea * 



51. Anodonta grandis footiana Lea * * * 



52. Anodontoides ferussacianiis bitchancnsis 



(Lea) * * 



53. Unio coinplaiiatus "Sol." (Dill.) * * 



54. Sphccrium sulcatum (Lam.) * 



55. Sphccrium sulcatum planatiim Sterki * 



56. Sphccriuni lincatum Sterki , '^ 



57. Sphccrium stamincum (Con.) * 



58. Sphccrium vcrmontanum Prime * 



59. Sphccrium rhomb oideum (Say) " "^ 



60. Sphcenum occidentale Prime * * 



61. Musculium truncatum (Lins ) * * 



62. Pisiditim variabile Prime * * 



63. Pisidium ncglcctum Sterki * 



64. Pisidium subrotundum pumilum Sterki * * 



65. Pisidium sp * * 



Total for each locality 41 18 33 28 



