Pio. 41. The shore of Copper Island, in the Bering Sea, showing a Eookery of Fur-seals. 

 The seals prefer the rooky portion of the beaoh close to the water, and only the weaker 

 forms, unable to obtain a foothold there, haunt the smooth ground at the back of the 

 rookery. (Photo hy Prof. D'Arcy W. Thow/pson.) 



