ADfiLIE PENGUINS 



the chicks had very light-coloured down. This is 

 shown in some of the specimens I brought back 

 to the British Museum. 



(B) Variations. 



Variations occasionally are met with in the 

 plumage and soft parts of Adelies. The least rare 

 of these consist of tufts of white feathers amongst 

 the black plumage of the head. Several specimens 

 so marked were seen at Cape Adare during the 

 summer of 1911-12. 



When these white tufts were present the feathers 

 comprising them were usually longer than the black 

 feathers among which they appeared, so that they 

 stuck out in an untidy manner, and were very con- 

 spicuous. 



In marked distinction to the slight variations 

 above described were the three " Isabelline " 

 varieties that I preserved, and are now to be seen 

 in the British Museum collection. As these varia- 

 tions are very starthng, and of the greatest interest, 

 I give below a full description of their plumage and 

 soft parts. 



First specimen captured on the Cape Adare 

 rookery on November 4, 1911. 

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