CHAP. xil. OF NORFOLK CLIFFS. 217 



Hippopotamus (major ?). 



Sue. 



Equus (fossilis ?). 



Bos. 



Cervus Capreolus ? and other species of Cervus. 



Arvicola amphibia. 



Castor trogontherium. 



Castor europceus. 



Narwhal, walrus, and large whale, or Balcenoptera ? 



Mr. Gunn informs me that two large whales were found in 

 the fluvio-marine beds at Bacton, and that the vertebraB of 

 one of them, shown to Professor Owen, were said by him to 

 imply that the animal was sixty feet long. A narwhal's tusk 

 was discovered by Mr. King near Cromer, and the remains of 

 a walrus. No less than three species of elephant, as deter 

 mined by Dr. Falconer, have been obtained from the strata 

 3 and 3', of which, according to Mr. King, E. meridionalis 

 is the most common, the mammoth next in abundance, and 

 the third, E. antiquus, comparatively rare. 



The freshwater shells accompanying the fossil quadrupeds, 

 above enumerated, are such as now inhabit rivers and ponds 

 in England ; but among them, as at Runton, between the 

 ( forest bed ' and the glacial deposits, a remarkable variety 

 of the Cydas amnica occurs, fig. 28, p. 218, identical with 

 that which accompanies the Elephas antiquus at Ilford and 

 Grays in the valley of the Thames. 



All the freshwater shells of the beds intervening between 

 the forest-bed No. 3,' and the glacial formation 4, fig. 27, 

 are of recent species. As to the small number of marine 

 shells occurring in the same fluvio-marine series, I have seen 

 none which belonged to extinct species, although one or two 

 have been cited by authors. I am in doubt, therefore, 

 whether to class the forest bed and overlying strata as post- 



