CHAPTER XVI

CONTINENTAL ISLANDS OF RECENT ORIGIN: GREAT BRITAIN

Characteristic Features of Recent Continental Islands--Recent Physical Changes of the British Isles--Proofs of Former Elevation--Submerged Forests--Buried River Channels--Time of Last Union with the Continent--Why Britain is Poor in Species--Peculiar British Birds---Fresh-water Fishes--Cause of Great Speciality in Fishes--Peculiar British Insects--Lepidoptera Confined to the British Isles--Peculiarities of the Isle of Man Lepidoptera--Coleoptera Confined to the British Isles--Trichoptera Peculiar to the British Isles--Land and Fresh-water Shells--Peculiarities of the British Flora--Peculiarities of the Irish Flora--Peculiar British Mosses and Hepaticae--Concluding Remarks on the Peculiarities of the British Fauna and Flora

_Pages_ 331-372