Guelph Fauna In The State Of New York is a book written by John Mason Clarke in 1903. The book provides a comprehensive study of the fauna found in the Guelph formation of New York State during the late Silurian period. The author describes the various species of invertebrates and vertebrates that lived during this time, including trilobites, brachiopods, and fish. The book also discusses the geological history of the Guelph formation and its significance...