4 LLOYDS NATURAL HISTORY. 



It should be added that the evidence of the non-existence of 

 these forms during the period of the forest-bed is merely of a 

 negative nature. 



On the other hand, at the present day, Britain lacks a very 

 large number of the species of Mammals now inhabiting the 

 Continent, and this deficiency is much more marked in the 

 case of Ireland than it is in England and Scotland; while 

 if we take into consideration Reptiles and Amphibians, which 

 are much less readily dispersed than are Mammals, the dis- 

 crepancy is still more marked. 



In dealing with the Mammals, we must of course omit all 

 the purely aquatic forms, such as Seals, Whales, Porpoises, 

 Dolphins, &c., and confine our attention to those which pass 

 the whole or a large portion of their time on land. On the 

 other hand, it is obvious that we have no right to exclude species 

 like the Wolf and Wild-Boar, which have been exterminated by 

 human agency, during the historic period ; and we accordingly 

 reckon all such as part and parcel of the present British fauna. 



The following list includes the various species of terrestrial 

 Mammals which are known to have inhabited the British 

 Islands during the historic period, the writer being indebted to 

 Mr. A. G. More, of Dublin, for those found in Ireland. 



1. Greater Horse-shoe Bat {Rhinolophus ferrum-equinuui), 



2. LessQv KoxsQ shoQ Bsit (J^/imoloJ)/ms /iipJ>osi'derus). I. 



3. Long-eared Bat {PIccotus auritus). I. 



4. Barbastelle Bat {Synotus barbastellus), 



5. Serotine Bat {Vesperugo serotinus). 



6. Noctule Bat ( Vesperugo fiodula), 



7. Hairy-armed Bat ( Vesperugo leisleri). I. 



8. Pipistrelle Bat ( Vesperugo pipistrellus). I. 



9. Daubenton's Bat ( Vespertilio daube?itoni). I 

 10. Reddish-grey Bat [Vesper tilio nattereri). I. 

 ti. Bechstein's Bat {Vespertilio bechstei?ii). 



