""Niagara Fossils: Graptolitidae Of The Upper Silurian System, Stromatoporidae Of The Upper Silurian System, Fifteen New Species Of Niagara Fossils"" is a scientific book written by Joseph William Spencer and first published in 1884. The book is a comprehensive study of the fossils found in the Upper Silurian System of the Niagara region, particularly the Graptolitidae and Stromatoporidae families. The author describes in detail the morphology, taxonomy,...