xliv 



YORKSHIRE VERTEBRATE FAUNA. 



A General Summary of the Vertebrate Fauna of York- 

 shire and of the British Isles, may thus be expressed : 



MAMMALIA : 



TERRESTRIAL 

 MARINE 



BIRDS .... 



REPTILES : 



TERRESTRIAL 

 MARINE 



AMPHIBIA - - 



FISHES: 



FRESHWATER 

 MARINE 



Few words are needed in concluding the introductory obser- 

 vations. The plan of the work, as defined in the opening 

 paragraph of the introduction, has been rigidly adhered to, the 

 necessary information as to the faunistic position, migrations, and 

 geographical range of the various species being expressed with 

 studied brevity, irrelevant matter carefully excluded, and literary 

 style invariably subordinated to scientific accuracy. The only 

 deviation from the rule of brevity is in the case of species like 

 the Great Bustard and Common Seal, which have become extinct 

 so recently as to impose upon naturalists the moral obligation to 

 search out all the traditions while they are fresh in the memories 

 of men, and to rescue from oblivion every possible scrap of 

 evidence. 



In the case of rare species in the public museums of the 

 county, and also in a few of the instances of their being in 

 private collections, it is deemed useful to indicate where they are 

 now preserved. 



