o04 
to be swept down by the floods. From these two sources 
the following Pleistocene mammalia have been obtained in 
Yorkshire : — 
KiRKDALE. 
Caverns. 
« o 
River 
Deposits. 
Felis spelsea 
Hyaena spelsea ... 
Canis lupus 
Cam's vulpes 
Mustela erminea 
Ursus spelaeus ... 
Ursus Arctos 
Bos primigenius 
Bison priscus 
Megaceros Hibernicus ... 
Cervus elaphus ... 
Cervus tarandus 
Elephas antiquus 
Elephas primigenius ... 
Hippopotamus major ... 
Equus fossilis ... 
Rhinoceros leptorhinus (Owen) 
Arvicola amphibia 
Arvicola agrestis 
Lepus timidus ... 
Lepus cuniculus 
Mus musculus ... 
To this list Professor Owen would add the Bos longifrons 
and the Woolly rhinoceros (Rhinoceros tichorhinus) ; but a 
careful examination of the remains ascribed to these animals 
in the museums of York, Oxford, and London, has convinced 
me that they belong respectively to the bison and the Lep- 
torhine rhinoceros. Amounting in all to 22 species, which 
is nearly half of the entire number of Pleistocene mammalia 
whose remains have been found in Britain. These fall into 
five distinct groups. The first comprehending all the extinct 
species; the second, those confined at the present day to 
northern climates; the third, those confined to southern; the 
fourth, those common to northern and tropical climates; and, 
lastly, those still inhabiting the temperate zones of Europe. 
