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crag itself. To the Pleistocene belong the forest-bed, and the various 
glacial and post-glacial beds which skirt the eastern coast, and are 
found in various parts of the county. 
The total number of species included in the list is twenty-eight ; 
but this number will in all probability be largely increased as we 
get a further and wider knowledge of paleontological science. 
Of the twenty-eight species, five belong only to the stony bed 
and Norwich crag. These are as follows 
Mastodon arvernensis 
ElEPHAS MERIDIONALIS ArVICOLA AMPH1BIUS 
Equus plicidens Arvicola agrestis 
This meagre list of the stony bed and Norwich crag mammalia, 
will undoubtedly be largely added to as more attention is paid- to 
these most important deposits. 
Of the remaining species, eleven are peculiar to the forest-bed, 
viz. : — 
Rhinoceros etruscus 
Rhinoceros leptoriiinus 
Cervus sedgwickii 
Cervus verticornis 
Cervus latifrons 
Cervus carnutorum 
Cervus polignacus 
Cervus gunnii 
Cervus booides 
Trogontherium cuvieri 
PALiEOSPALAX MAGNUS 
The remaining species belong either to the post-glacial deposits, 
or to the forest-bed and these deposits indiscriminately. 
The species of mammalia enumerated above, belonging to the 
later divisions of the Tertiary period, are much more closely allied 
as might be expected to the existing species now characterizing the 
old world fauna, than to that of the -new. We have, carnivora, 
elephants, rhinoceroses, and hippopotamuses, then, as now, 
characteristic old world forms. The ruminants again, are equally 
characteristic of the eastern hemisphere, though not exclusively 
confined to it. No law is more firmly established than that laid 
down by Professor Owen, viz : — “That with extinct as with existing 
mammalia, particular forms were restricted to the same provinces 
at a former geological period as they are at the present day.” 
In looking through this list of the various species, one cannot 
fail to be struck with the total disproportion of numbers between 
herbivora and carnivora. In a total of twenty-eight species, no less 
than twenty-four are herbivorous, whereas we have only three 
