DR. C. O. WHITMAN, DR. C. E. BESSEY, H. C MERCER, PROF. C. M. WEED, PROF. W. S. BAYLEY, PROF. E. A. ANDREWS, PROF. A. C. GILL, PROF. H. C. WARREN, ERWIN F. SMITH.
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On the Mississippi Valley Unionidæ Found in the St. Lawrence and Atlantic Drainage Areas. C. T. SIMPSON