Additional Notes on the Naiades (Fresh-Water Mussels) of the Lower Tennessee River

In 1925, Dr. A. E. Ortmann published in this journal the results of his investigations of the fresh-water mussels in the Tennessee drainage below Walden Gorge. That study constitutes the only source of basic information available for this group of animals in the entire lower Tennessee River. Recently, considerable additional material regarding the mussels inhabiting the main portion of the river from Walden Gorge to its mouth at Paducah has been made available for study. The collections upon which this research is based were largely accumulated by Dr. M. M. Ellis of the U. S. Bureau of Fisheries, who with the aid of a staff of field assistants surveyed the lower Tennessee in July and August of 1931. The information resulting from this survey has been supplemented by records available in the collections of the University of Michigan Museum of Zoology, and by reference to citations in the literature.