504 
to be swept down by the floods. From these two sources 
the following Pleistocene mammalia have been obtained in 
Yorkshire : — 
Kirkdale. 
Caverns. 
Kiver 
Deposits. 
Kirby 
Moorside. i 
Kirkdale. 
■> 
Bielbecks. 
Leeds. 
J 
Eelis spelaea 
X X 
X — 
Hyaena spelaea 
X X 

Canis lupus 
— X 
X — 
Canis vulpes 
- — X 
— 
Mustela erminea 
— X 
_ 
Ursus spelaeus ... 
— X 

Ursus Arctos 
— X 
— 
Bos primigenius 
— — 
X — 
Bison priscus 
— X 
X x 
Megaceros Hibernicus ... 
— X 
— 
Cervus elaphus ... 
■ — X 
X — 
Cervus tarandus 
— X 
Elephas antiquus 
— X 
— — 
Elephas primigenius 
— _ 
X X 
Hippopotamus major ... 
— X 
— X 
Equus fossilis ... 
X 
X — 
Rhinoceros leptorhinus (Owen) 
— X 
X — 
Arvicola amphibia 
— X 
— 
Arvicola agrestis 
— X 
— — 
Lepus timidus ... 
— X 
— 
Lepus cuniculus 
— X 
— — 
Mus musculus ... 
— X 
— — 
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. 
