The Galaxy. A Magazine of Entertaining Reading, Volume 23, January-June 1877. Sheldon & Company, New York. 868 pages.
This is not a science fiction magazine. It has stories, poems and bits of miscellany, and according to the Library of Congress, was “absorbed” by The Atlantic Monthly (old issues; current website).
Issues
January 1877
February 1877
March 1877
April 1877
May 1877
June 1877