CHAPTER III.
_GUILLEMOTS, RAZORBILL, AND PUFFIN._ Affinities and Characteristics—Changes of Plumage—Guillemot— Brunnich’s Guillemot—Black Guillemot—Razorbill—Little Auk— Puffin 123-150
_GUILLEMOTS, RAZORBILL, AND PUFFIN._ Affinities and Characteristics—Changes of Plumage—Guillemot— Brunnich’s Guillemot—Black Guillemot—Razorbill—Little Auk— Puffin 123-150