The Paleozoic era's Silurian period saw animals and plants finally emerge on land. But first there was a period of biological regrouping following the disastrous climax to the Ordovician.
This is a complete catalogue of the Cambrian and Silurian fossils in the Geological Museum at the University of Cambridge. Preceded by a detailed introductory section on the Palæozoic system, the ...
Though unfinished, Salter's monograph has thirty excellent plates which make it an essential starting point for the study of British Devonian, Silurian and Ordovician trilobites. The monograph is also ...