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3 force of the [[strikethrough]]D[[/strikethrough]] department. Mr Gilbert D. Harris and Mr. Frank Burns of the U. S. Geological Survey, in the course of their work on the tertiary invertebrate fossils, have rendered incidental assistance on that part of the collection. The writer, with the permission of the Director, has continued to act as Honorary Curator. The members of the force have been diligent, faithful and accurate in their work, and Mr. Simpson especially has devoted much time outside of ordinary office hours to forwarding the work of the [[strikethrough]] D [[/strikethrough]] department and assisting its numerous correspondents. General Operations. [[paragraph symbol]] The routine work of the year has made good progress. The