Charles Tate Regan (1 February 1878 - 12 January 1943) was a British ichthyologist, working mainly around the beginning of the 20th century. He did extensive work on fish classification schemes. Born in Sherborne, Dorset, he was educated at Derby School and Cambridge University and in 1901 joined the staff of the Natural History Museum, where he became Keeper of zoology, and later director of the entire museum, in which role he served from 1927 to 1938.
The Carus Publishing Company is a publisher with offices in Chicago, Peru, Illinois, and Peterborough, New Hampshire. It owns the Open Court Publishing Company as well as the Cricket Magazine Group, and Cobblestone Publishing. Open Court is known for their Popular Culture and Philosophy books, while Cricket and Cobblestone produce a range of children's magazines.