190 THE MICHIGAN ACADEMY OF SCIENCE. 



LIST OF MOLLUSCS. 



1. Polygyra albolahris (Say). Porcupine mountains and Lake Gogebic. 



2. Polygyra monodon var. fraterna (Say). Porcupine mountains and Lake 

 Gogebic. 



3. StroMlops Virgo (Pils.) Porcupine mountains and Lake Gogebic. 



4. Bifidaria contracta Say. Lake Gogebic. 



5. Bifidaria curvidens Gld. Porcupine mountains. 



6. Vertigo ovata Say. Lake Gogebic. 



7. Vertigo species (?). Porcupine mountains. 



8. Cochlicopa lubrica (Miill.). Porcupine mountains. 



9. Vitrina limpida Gld. Porcupine mountains. 



10. Vitrea tinneyana (Mse.). Porcupine mountains and Lake Gogebic. 



11. Vitrea ferrea (Mse.). Porcupine mountains and Lake Gogebic. 



12. Vitrea hammonis (Strom.). Porcupine mountains and Lalie Gogebic. 



13. Vitrea indentata (Say). Porcupine mountains. 



14. Vitrea multidentata (Say). Porcupine mountains. 



' 15. Euconulus chersinus var. polygyratus (Pils.). Porcupine mountains and Lake 

 Gogebic. 



16. Euconulus fulviis (Dr.). Porcupine mountains and Lake Gogebic. 



17. Zonitoides arboreus (Say). Porcupine mountains and Lake Gogebic. 



18. Zonitoides exiguus (Stimp.). Porcupine mountains and Lake Gogebic. 



19. Zonitoides milium (Mse.). Porcupine mountains and Lake Gogebic. 



20. Zonitoides nitidus (Miill.). Lake Gogebic. 



21. Agriolimax campestris (Binn.). Porcupine mountains. 



22. Philomycus dorsalis (Binn.). Porcupine mountains. Has never before 

 been recorded from Michigan. 



23. Fyramidiila alternata (Say). Porcupine mountains and Lake Gogebic. 



24. Pyraniidula striatella var. catskillensis Pils. Porcupine mountains and 

 Lake Gogebic. 



25. Ilelicodiscus lineatus (Say). Porcupine mountains and Lake Gogebic. 



26. Punctum pygmaeum (Dr.). Porcupine mountains and Lake Gogebic. 



27. Sphyradium edentuliim (Dr.). Porcupine mountains. 



28. Succinea avara Say. Lake Gogebic. 



29. Succinea retusa Lea. Carp Lake, Lake Gogebic and Little Iron river. 



30. Carychium exigiuum Say. Porcupine mountains. 



31. Carychium exile H. C. Lea. Porcupine mountains and Lake Gogebic. 



32. Limnaea decollata (Say). Union river. 



33. Limnaea desidiosa (Say). Head waters of Union river, Union spring, 

 Union creek, Little Iron river and several small creeks. 



34. Limnaea lanceata Gld. Lake Gogebic. 



35. Limnaea species (?). First creek west of Little Iron river, Iron river. Head 

 waters of Union river, Cayahaga creek. Lake Gogebic. 



36. Physa gyrina (Say). Union river. 



37. Physa heterostropha (Say). Carp lake. 



38. Physa integra (Hald.). Head waters of Union river and Little Iron river. 



39. Physa sayii var. loarreniana (Lea.). First creek west of Little Iron river. 

 Little Iron river, Union creek and Mud creek. 



40. Physa species (?). Head waters of Union river, Cayahaga creek and Lake 

 Gogebic. 



41. Aplexa hypnorum (L.). Lake Gogebic. 



42. Planorbis hirsutus (Gld.). Carp lake and Lake Gogebic. 



43. Planorbis hicarinatus (Say). Union river. Lake Gogebic and Little Iron 

 river. 



44. Planorbis campanulatus (Say). Carp lake and Lake Gogebic. 



45. Planorbis exacutus (Say). Lake Gogebic. 



46. Planorbis parvus (Say). Carp lake. First creek west of Little Iron river. 

 Union river, Cayahaga creek. Mud creek, Little Iron river. Union creek and other 

 small creeks and Lake Gogebic. 



47. iSegmentina armigera (Say). Lake Gogebic. 



48. Ancylus parallelus (Hald.). Carp river and Lake Gogebic. 



49. Valvata tricarinata (Say). Union river. 



50. Campeloma milesii (Lea). Lake Gogebic. 



51. Amnicola limosa (Say). Union river and Lake Gogebic. 



