PLUMAGE 



487 



were moulting irregularly, as shown in the cut, drawn to 

 his diagnosis. 





'fc. 



/Ifc 







^iev 



^ew Feather _ ~ ~" - -^— v / 

 Old Feather _ _ ~ ^~ ~ — Y/f 



/Veiv Feather //-/^ 



A'ew and growing Feather. -/--' 



(9/c/ Feather — 



/^ew Feather "^JT— -T (^ 



(9/^ Feather --- — — / 



Accidental Variation in Plumage. — Doubtless albinisms 

 exist occasionally in the Gannet, as in every other bird. 

 None are recorded, but a case in which the lack of pigment 

 was partial, is alluded to in Knud Andersen's Faeroese 

 journals. He says, writing about the annual harvest of 



