""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 published in 1884. The book focuses on the fossils found in the Niagara region, particularly the graptolites and stromatoporoids from the Upper Silurian System. The author provides detailed descriptions and illustrations of these fossils, as well as identifying fifteen new species of Niagara fossils. The book is a valuable resource for geologists and paleontologists interested in the history of the Niagara region and the evolution of these species.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.