Occasional Papers of the Musenin of Zoology 13 



Summary of the Distribution of the Species Listed, In- 

 cluding IsivE RoYALE Records. 



S. ■= Schoolcraft County, A. =: Alger Co., C. ^= Chippewa Co., 

 I. R. = Isle Royale. 



S. A. C. \R. 



1. Polygyra albolabris (Say) * * * "^ 



2. Polygyra fratcrna (Say) * * * 



3. Vitrca hammonis (Strom) * 



4. Vitrca binneyaiia (Mse.) * * 



5. Vitrea fcrrca ( Mse.) * 



6. Eucoiiuliis clicrsiiius polygyratiis Pils =1= * * 



7. Zonitoidcs arborca ( vSay) * * * * 



8. Zonitoidcs cxigiia (Stimp.) * * 



g. Agriolimax agrcsiis (L.) '■' 



10. Agriolimax cainpcstris (Binn.) * * 



\i. PalUfcra dorsalis (Binn.) * * * * 



12. Pyraiiiidula alfcriiata (Say) * * :ic * 



13. Pyraiiiidula cronkhitci anthonyi Pils * * 



14. Pyraiiiidula cronkhitci ■catskillciisis (Pils.). * * 



i^. Hclicodiscus parallclus (Say) * * * 



16. Succinca rctusa Lea * " 



17. Succinca oralis. Say ? '^ * 



18. Strobilops virgo (Pils.) * * 



19. Coclilicopa lubrica (Miill.) * * 



20. Lynincca humilis modiccUa (Say) * 



21. Lynincca obrussa peninsula: Walker * 



22. Lynincca obrussa exigiia Lea * 



23. Lynincca clodcs Say * 



24. Lynincca lanccafa Gld * 



25. Lyniancca cinarginata Say 



26. Physa gyrina Say * * * * 



27. Physa clliptica Lea * 



28. Physa ancillaria crassa \\''alker 



29. Physa sayii warrcniana Lea? * * 



30. Physa Integra Hald. var * 



31. Physa aplcctoides Sterki * * 



32. Physa sp * * * 



33. Aplcxa hypnoruni (L.) * * 



34. Planorbis trivolvis Say * * * 



35. Planorbis trivolvis binncyi Tryon * 



36. Planorbis antrosus (Con.) * * 



T,j. Planorbis antrosus striaius (Baker) * * 



38. Planorbis liirsutus Gld * * 



