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 PIN NIPEDIA. 
Fam. TRICHECHIDZ, 
29. Trichechus rosmarus Z. Walrus. 
Fam. PHOCIDZ. 
30. Phoca vitulina Z. Common Seal. 
33 
34 
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 the last twenty years. 
. Phoca hispida Schred. Ringed or Marbled Seal. 
. Phoca groenlandica 7ad. Greenland or Harp Seal. 
. Halichcerus gryphus (/a.). 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. 
. Cystophora cristata (Zrx/.). Hooded Seal. 
