The Mesozoic era ranged from 240 million to 65 million years ago. In British Mesozoic Fossils 365 species from this period are classified and illustrated with accurate line …
The opening of the Palaeozoic era, some 540 million years ago, coincides with a remarkable burst of evolutionary activity. In British Paleozoic Fossils 443 species from this time, …
The Cenozoic era began about 70 million years ago and still continues. In British Cenozoic Fossils 354 species from this period are classified and illustrated with accurate line …
