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The collections of Oligochseta made in connection with the work of the Biological Experiment Station upon the Illinois River, at Havana, contain about thirty species, of which the greater number have been previously described. Two species, one of which must be regarded as belonging to a new genus, are described in this paper.doi:10.21900/j.inhs.v4.438 fatcat:qucb5vqhpveankhykrmnljapli