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of Mexico and the Caribbean Sea. The second and concluding part of this Report, including the Gastropoda and Scaphopoda is now printed and forms a volume of about 800 pages with thirty-one plates. Work had also been done on the dredgings of the U.S. Fish Commission in the same region and on the voyage of the Albatross to California, a report on which is nearly finished. A new systematic arrangement of the Bivalve Shells, or Pelecypoda has occupied the Curator's attention, and the correlation of the Tertiary especially the Pliocene fossils of our southeastern Atlantic coast with the recent fauna of that coast is in progress with a prospect of publication during