Parts 41--42. Pages 457--462.
1875.
The name of this species has, more recently, been given as Catharacta skua.
Plate 609.
Common Skua.
Stercorarius catarrhactes.
Parts 57--58. Pages 463--469.
1877.
The name of this species has, more recently, been given as Stercorarius pomarinus.
Plate 610.
Pomatorhine Skua.
Stercorarius pomatorhinus.
Parts 55--56. [Stercorarius crepidatus]. Pages 471--479.
1876.
The name of this species has, more recently, been given as Stercorarius parasiticus.
Plate 611.
Richardson's Skua.
Young, and Dark Form.