6 LLOYD S NATURAL HISTORY. 



46. Roe Deer {Capreolus capred), 

 4 7."^^ Wild Boar {Sus scrofd). I. 



In this list No. 11 has but little right to a place, having only 

 been taken once in Britain. Three other Bats, namely Ves- 

 psrugo discolor^ Vespertilio dasycneme^ and Vespertilio murinus^ 

 which have been recorded from England, are altogether omitted, 

 since the first was almost certainly introduced, while the other 

 two have no claim to be regarded as habitual denizens of our 

 area. The four species marked with a * are extinct, and per- 

 haps Wild Cattle should be included under the same heading. 

 The Reindeer is not mentioned, since its existence within the 

 limits of the British Islands during the historic period is very 

 doubtful. Those species which have been introduced have a 

 t prefixed to their names ; while such as occur in Ireland have 

 the affix " I." It is not improbable that the Common Mouse 

 should be included under the former heading. 



Omitting the latter, together with those forms which are cer- 

 tainly known to have been introduced, and likewise disregard- 

 ing Bechstein's Bat, we thus have a total of forty-one terrestrial 

 Mammals which can be regarded as indigenous inhabitants of 

 Britain during the historic period ; five, or perhaps six, of these 

 being extinct. Out of these only twenty-three are found in Ire- 

 land ; and since the Squirrel was probably introduced into that 

 island, while three species are now exterminated, the list of 

 truly indigenous living Hibernian terrestrial Mammals is re- 

 duced to nineteen. On the other hand, it is stated by Dr. 

 Wallace that Germany possesses nearly ninety species, and 

 even Scandinavia as many as sixty; although it is probable 

 that these numbers include the introduced species mentioned 

 above. 



We have now to account for this discrepancy between the 

 British and Continental Faunas ; and here we may state that 

 the Glacial period, during which the greater part of Britain 



