MAMMALIA. 



considers to be of the date of the Roman occupation. The 

 statements of the historians of Galtres Forest, that it was 

 a famous harbour for bears, are open to very considerable 

 doubt. 



Sub-order PINNIPEDIA. 

 Fam. TRICHECHID^:. 



29. Trichechus rosmarus Z. Walrus. 



Fam. PHOCID.E. 



30. Phoca vitulina L. Common Seal. 



Casual visitant, of uncommon occurrence along the coast and 

 in the Humber. In the early years of the present century 

 seals bred in great numbers at the mouth of the Tees, and 

 in 1802, as appears from a document, a copy of which Mr. 

 T. H. Nelson has sent me, they interfered to such an ex- 

 tent with the salmon fishery that determined measures were 

 proposed for their extirpation. There is no evidence to 

 show that the extermination was so effected, but it is hardly 

 probable that they would long survive the rapid rise of the 

 Cleveland iron trade and the shipping industries of Middles- 

 borough, and in all likelihood the decade 1830 to 1840 

 would be that of the final extinction of the seal as a perma- 

 nent resident in Yorkshire, though solitary individuals have 

 been observed to within th last twenty years. 



31. Phoca hispida Schreb. Ringed or Marbled Seal. 



32. Phoca grcenlandica Fab. Greenland or Harp Seal. 



33. Halichcerus gryphus (Fab.). Grey Seal. 



In 1808 Graves, in his list of Cleveland animals, included 



not only the Common Seal but the ' Great Seal or Sea 



Calf of Pennant's Zoology, 36. 

 Mr. R. M. Middleton, jun., informs me that in 1871 one was 



found alive at Seaton Snook, on the Durham shore of the 



Tees mouth. 



34. Cystophora cristata (Erxl.). Hooded Seal. 



