The Illustrated Guide to the Fish, Amphibian, Reptilian, and Supposed Mammalian Remains of the Northumberland Carboniferous Strata is a scientific book written by Thomas Pallister Barkas in 1873. The book is a comprehensive guide to the fossils found in the Northumberland Carboniferous Strata, which is a geological formation located in the northeast of England. The book includes detailed descriptions and illustrations of the various fish, amphibian,...