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20.

indicate the direction of the studies carried on during the year. The report on the later Tertiary of the United States and Mr. Simpson's paper on Floridian uniones, though printed, will be [[strikethrough]] published [[/strikethrough]] issued a few days too late to appear in the Bibliography of this year. The principal labor of the year has been bestowed on the continuation of the Report on the Florida Tertiary Mollusks, for the Wagner Institute of Philadelphia: preliminary work on the mollusks of the Galapagos trip of the U. S. Fish Commission Steamer Albatross, and also those collected by Dr. G. Baur: and on the Unionidae, to which group Mr. Simpson is giving special attention.