An associational study of Illinois sand prairie . c species and the third was aan inhabitant of deep forest so that they were all utterly foreignto sand-prairie. The species v/ere: Pianorbis trivolvus Say, froma sandy lane at the Devils Hole; Campeloma integrum De Kay froma sandy roadside east of Havana; and Pyramidula solitaria Say,from a blowout at the Devils Heck. Order OLIGOGHAETA Diplocardia sp. (indeterminable), April 4. One specimen taken under a board with Lithobiua andLacon rectangularis. in bunch-grass. Earth-worms eat the organicpart of the soil; as sand has a very small humus conte
An associational study of Illinois sand prairie . c species and the third was aan inhabitant of deep forest so that they were all utterly foreignto sand-prairie. The species v/ere: Pianorbis trivolvus Say, froma sandy lane at the Devils Hole; Campeloma integrum De Kay froma sandy roadside east of Havana; and Pyramidula solitaria Say,from a blowout at the Devils Heck. Order OLIGOGHAETA Diplocardia sp. (indeterminable), April 4. One specimen taken under a board with Lithobiua andLacon rectangularis. in bunch-grass. Earth-worms eat the organicpart of the soil; as sand has a very small humus content, theearthworms are very rare in sand. The decay of the boards orlogs may furnish more of the humus than the sand. Another earth-worm, probably the same species, was taken in a similar situationon another dune. Order CHILOrODA Lithobius sp. (indeterminable). April 4, 5. One specimen taken under a large board near a dune sum-mit. The soil had quite a little humus, indicating rather anadvanced stage of bunchgrass. Another from under a log at the. 70 edge of a field. Myriapods are very rare in the sand-prairie;the soil conditions are unfavorable. The genus is Order DIPLOPODA Parajulus sp. (indeterminable), April 6. Several specimens in a non-typical part of the IDevilsHole hunch-grass. Considerable humus was in the soil. The scar-city of organic material in the sand normally keeps millepeds outof the sand region.
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Keywords: ., bookcentury1900, bookdecade1910, bookidassocia, booksubjecttheses
