96 MICHIGAN SURVEY, 1905. 



numbers among the rushes on the delta of Little Carp river, VII. 1. VII. 3. 

 One specimen was also taken on a mud flat in Little Carp river, near the 

 lake. 



40. Sphaerium simile (Say). V. 1. This species was found in the mud 

 at the outlet of Carp Lake, and on the mud flats of Little Carp river, VII. 3. 



41. Sphaerium rhomboideum (Say). V. 1. Partially buried in the fine 

 silt covering the bottom of Carp Lake just off shore. 



42. Pisidium sp. \. 2. Beneath a partly submerged log on the delta 

 of Carp river. 



43. Pisidium sp. (immature). II. 2. Among the leaves in a spring 

 pool in the hardwood forest. 



2. ISLE ROYALE. 



1. Agriolimax campestris (Binn.). Among fallen alder leaves on a wet 

 flat along Washington river, II, and in the humus of the cedar swamp, IV. 



2. Agriolimax? (specimen mutilated). VIII. One specimen taken on 

 the under side of a stone in shallow water at Siskowit Bay. 



3. Pallifera hemphilli (W. G. Binn.). IV. A specimen of this slug was 

 found in swamp humus on Washington creek. 



4. Vitrina limpida Gld. VI. Several specimens were taken in decaying 

 spruce logs in the coniferous forest. Found also in the damp fallen leaves, 

 in the deciduous forest, III. 



5. Zonitoides arborea (Say). II. On Washington river among the 

 fallen leaves in an alder thicket on a wet mud flat, and among the leaves 

 and under the bark of fallen spruce and birch trees on dryer ground. III. 

 Found among the leaves and under the rocks in the deciduous forest. IV. 

 A few specimens taken in the humus of a cedar swamp on Washington 

 creek. V. Collected in the moss in the tamarack swamp. VI. Several 

 found beneath the bark of fallen spruce trees in the coniferous forest. 



6. Zonitoides milium (Mse.). Specimens of this form were collected 

 among the leaves and in fallen birch logs in the deciduous forest, III; in the 

 moss of the tamarack sw r amp, V, and beneath the bark of fallen spruce 

 trees, VI. 



7. Vitrea binneyana (Mse.). II. Taken among the fallen leaves in an 

 alder thicket on a mud flat on Washington river, and in the moss in the 

 coniferous forest bordering the river. Specimens were found under stones 

 and among the fallen maple leaves in the deciduous forest, III ; in the humus 

 of the cedar swamp, IV; in the fallen spruce logs in the coniferous forest, 

 VI, and in the moss of the tamarack swamp, V. A few specimens were 

 also found in the moss among the bearberry bushes on the Minong Trap 

 promontory, IX. 



8. Zonitoides exigua (Stimp.). II. Found among the fallen leaves 

 of an alder thicket on a very wet mud flat, and in the moss covering the 

 ground in the coniferous forest bordering the river. Collected among the 

 fallen leaves in the deciduous forest, III; in the moss of the arbor vitae 

 swamp, IV, and in the moss of the tamarack swamp, V. Also found in the 

 moss among the bearberry bushes on the Minong Trap promontory, IX. 



9. Pyramidula alternata (Say). III. Among the damp fallen leaves, 

 beneath the bark of fallen birch logs, and under stones in the deciduous 

 forest. 



10. Pyramidula striatella (Anth.). This species was collected on Wash- 

 ington river, II, among the fallen leaves of alders on a mud flat, and in the 

 moss in the coniferous forest, bordering the river. It was also collected in 



