POLISH SWAN. 



NATATORES. 



225 

 ANATIDJE. 



THE POLISH SWAN. 

 Cygnus immutabilis. 



Cygnusimmutalnlis, Polish Swa?i, YARKELL, Proc. Zool. Soc. 1838, p. 19. 



THE London dealers in birds have long been in the 

 habit of receiving from the Baltic a large Swan, which 

 they distinguish by the name of the Polish Swan. I had 

 reason to believe that this Swan would prove to be a 

 distinct species, though even more nearly allied externally 

 to our Mute Swan, than the Bewick's Swan is to the 

 Hooper. Previous to the year 1836, a nobleman wrote to 

 the late Mr. Joseph Sabine, to inquire what was the name 

 of a tame Swan he had seen with her brood, the Cygnets 

 of which were all white ; and in the spring of 1836, the 



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