226 COMPAEISON OF MUNDESLEY CHAP. xii. 



When I showed the scales and teeth of the pike, perch, 

 roach, and salmon, which I obtained from this formation, to 

 Mr. Agassiz, he thought they varied so much from their 

 nearest living representatives that they might rank as distinct 

 species ; but Mr. Yarrell doubted the propriety of so distin 

 guishing them. The insects, like the shells and plants, are 

 identical, so far as they are known, with living British 

 species. No progress has yet been made at Mundesley in dis 

 covering the contemporary mammalia. 



By referring to the description and section of the freshwater 

 deposit at p. 159, the reader will at once perceive the striking 

 analogy of the Mundesley and Hoxne deposits, the latter so 

 productive of flint implements of the Amiens type. Both of 

 them, like the Bedford gravel with flint tools and the bones of 

 extinct mammalia (noticed at p. 164), are postglacial. It 

 will also be seen that a long series of events, accompanied by 

 changes in physical geography, intervened between the ' forest 

 bed,' No. 3, fig. 27, p. 213, when the Elephas meridionalis 

 flourished, and the period of the Mundesley fluviatile beds 

 A, B, c ; just as in France I have shown, p. 199, that the 

 same E. meridionalis belonged to a system of drainage 

 different from and anterior to that with which the flint im 

 plements of the old alluvium of the Somme and the Seine 

 were connected. 



Before the growth of the ancient forest, No. 3, fig. 33, the 

 Mastodon arvernensis, a large proboscidian, characteristic of 

 the Norwich crag, appears to have died out, or to have become 

 scarce, as no remains of it have yet been found in the Norfolk 

 cliffs. There was, no doubt, time for other modifications in 

 the mammalian fauna between the era of the marine beds, 

 No. 2, p. 213 (the shells of which imply permanent sub 

 mergence beneath the sea), and the accumulation of the 

 uppermost of the fluvio-marine, and lignite beds, No. 3', which 

 overlie both Nos. 3 and 2, or the buried forest and the crag. 



