CASTOR EUROP AUS, 191 
the Castor Europeus of the present day, co-existed with 
the Trogontherium. Remains of the Beaver have been thus 
discovered by Mr. Green in the same fossilized condition, 
and under circumstances indicative of equal antiquity with 
the extinct Mammoth, in the lacustrine formations at Bacton. 
And M. Fischer, on his part, having received remains of’ a 
Beaver from near the Lake of Rostoff, in the department 
of Jarosslow, designated the species from the resemblance 
of the skull to that of the larger, and previously discovered 
Rodent, Tvrogontherium Wernert. Cuvier, however, to 
whom a drawing of the cranium had been transmitted, 
pronounced it to belong imcontestably to the Beaver; it 
had the same dimensions, the same crests, and the same 
depressions as the skull of the Castor Europeus, with 
which it accorded in the smallest particulars. The con- 
temporaneity of the beds in which this Beaver’s skull and 
that of the Trogonthertum were found in Russia, is not, 
however, so well ascertained as in the case of the Norfolk 
fossils referable to the Castoride. Remains of the Beaver 
(Castor Europeus), from the beach at Mundesley on the 
Norwich coast, are preserved in the collection of Miss H. 
Gurney, of North Repps Cottage, near Cromer; they are 
most probably from the fresh-water formation, and the 
Beaver may have been the inhabitant of that small river, 
which, Mr, Lyell imagines, “‘may have entered here, bring- 
ing down drift-wood, fresh-water shells, mud, and sand.”* 
Mr. Woodward notices the occurrence of fossil remains of 
the Beaver in the cliffs at Mundesley, and in the oyster-bed 
at Happisburg, Norfolk, in his Geology of that county. 
Mr. Lyell submitted to my inspection some years ago a 
portion of the characteristic femur of the Beaver, from the 
fluvio-marine crag at Thorpe, in Suffolk. 
* Philosophical Magazine, May, 1840, p. 253. 
