238 Darwin, and after Darwin. 



remote from continents, and known from independent 

 geological evidence to be of comparatively recent 

 origin that is, to have been separated from their 

 adjacent mainlands in comparatively recent times, 

 and therefore as islands to be comparatively young. 

 The British Isles furnish as good an instance as could 

 be chosen, for they together comprise over 1000 

 islands of various sizes, which are nowhere separated 

 from one another by deep seas, and in the opinion of 

 geologists were all continuous with the European 

 continent since the glacial period. 



BRITISH ISLES. 



NON-PECULIAR SPECIES. 



PECULIAR SPECIES. 



Total Peculiar Plants ........ 46 



Total Peculiar Animals 154 



Grand Total . . , , 3OO 



I have drawn up this table in the most liberal 

 manner possible, including as peculiar species forms 



