BIRDS. 



Plate IX. 



Tire head of the Adelie Penguin {Pygotscelis adeJIcv). Fig. 1, a day or two after 

 emerging' from the egg, with the angular pseudo egg-scale on the upper bill ; fig. i, 

 about a fortnight old : fig. 3, shedding the downy plumage ; and fig. 4, in the plumage 

 of the first year, with white throat and blackish bill and eyelids ; fig. .5 represents the 

 head of a normal adult : and fig. 6, that of an isabelline variation, with the occipital 

 crest raised and the eyes staring, as they appear in this species whenever it is angered or 

 excited. 



