286 MICHIGAN SURVEY, 1908. 



Michigan: Upper Peninsula and northern counties in Lower. 



Isle Royale: I, 3, Balsam-Spruce Forest, No. 140; I, 5, Jack Pine 

 Ridges, Nos. 19 A, 81 ; V, 2, Heath Zone and Beach near Siskowit Bay, 

 No. 130 A ; III, '04, Desor Trail, Nos. 141 A, 142 A ; V, '04, Ridge back 

 of Club House, Nos. 144 A, 147 A. 



In moist soil under loose rocks (Nos. 81 and 19 A) or in the loose 

 leaf mold under the balsam forest. No. 140; No. 130 A under Cladonm; 

 Nos. 141 A and 142 A, from leaf mould or rotten logs in yellow birch 

 or maple forest and Nos. 144 A and No. 147 A from under bark, leaves 

 and among moss in the forest. 



11. Eucormlus fulmis (Dr.). 



Range: "Holarctic, and widely distributed southward." (Dall). 



Michigan : Generally distributed. 



Isle Royale: I, 5, Jack Pine Ridge, No. 19 A; V, 2, Heath Zone and 

 Beach near Siskowit Bay, Nos. 129 A, 130 A; V. '04. Ridge back of the 

 Club House No. 147 A. No. 15 A from under a stone; Nos. 129 A and 

 130 A from under Cladoma. 



12. Euconulus chersinus polygyratus (Pils.). 

 Range: Northern United States and Canada. 

 Michigan: Generally distributed. 



Isle Royale: I, 5, Jack Pine Ridges, No. 19 A; V. 2, Heath Zone 

 and Beach near Siskowit Bay, No. 129 A; III, '04, Desor Trail, No. 

 142 A; V, '04, Ridge back of Club House, No.. 147 A. 



Found under a damp stone (No. 19 A) ; under Cladoma (No. 129 A) ; 

 in the forest under leaf mould, bark, moss or decaying logs (No. 142 A 

 and 147 A.). 



13. Zonitoides arhorea (Say). 



Range: "North America generally and Japan." (Dall). 



Michigan: Generally distributed. ' 



Isle Royale: I, 2, Natural Rock Clearings, No. 65; I, 3, Balsam- 

 Spruce Forest, Nos. 140, 141 ; I, 5, Jack Pine Ridges, Nos. 19 A, 81, 102 ; 

 II, 1, Ransom Clearing, No. 150; II, 2, Tamarack Swamp, No. 113; V, 

 2, Heath Zone and Beach near Siskowit Bay, Nos. 118 A, 129 A, 130 A ; 

 V, 4, BalsamrBirch Forest, No. 236; III, '04, Desor Trail, Nos. 142 A, 

 149 A ; V, '04, Ridge back of Club House, No. 147 A. 



In the thin soil collected under bearberry on the dry rock clearing 

 north of the light-house (No. 65) ; under loose rocks in the jack pine 

 ridges (Nos. 19 A, 81, 102) ; under log in an open, sunny place (No. 150) ; 

 or in leaf mold in the dense shade of the balsam forest; under Cladonia 

 (Nos. 138 A, 129 A, 130 A) ; and in the dense forest among litter (Nos. 

 142 A, 147 A, and 149 A). 



1:1. Zonitoides ewigua (Stimp.). 



Range: "Quebec and Ontario, New England, New York, Alleghany 

 Co., Pa. and Michigan." (Pilsbry). 



Michigan: Upper Peninsula and northern counties of the Lower. 



Isle Royale: III, '04, Desor Trail, Nos. 141 A, 149 A; V, '04, Back 

 of Club House, No. 144 A. 



Found only in the dense forest among litter. 



15. Zonitoides milium^ (Morse). 



Range: "Eastern United States and Canada, Manitoba," (Dall.) 



Michigan : Generally distributed. 



