275. Sula cyanops.
THE MASKED BOOBY.
Male 33". Female 32". Legs lavender. Bill bluish. Tail, quills, and greater wing-coverts black. Outer webs of flight-feathers brownish black. Tail-feathers sixteen to eighteen. Tropical seas. Christmas Island, Indian Ocean. (B. 1532. S.F. v. 303.)
Also S. variegata. 29". Similar to S. cyanops, but bill is red. Coasts of Chili and Peru.
Plumage above dark brown. S. nebouxi. 34". With feathers of head and upper neck narrow and pointed. Tail of sixteen feathers. Pacific coast of America.
(ii.) Feathers on throat extending forward in two lines. Mostly white. Head and neck buff. Naked band down middle of throat. Tail of twelve feathers.
S. bassana. 36". The Gannet or Soland Goose. Throat-patch 2" long. Primaries black. Full adult dress is not obtained till sixth year. Single egg (3.0 x 2.0), pale bluish green. N. Atlantic, extending south in winter to Gulf of Mexico, N. Africa, Madeira, and Canary Islands.
S. serrator. 36", Similar to S. bassana, but mid-tail is brown-black. Australia and New Zealand.
S. capensis. 31. Similar to S. bassana, but throat-patch is 6" long, and tail is brownish black. S. Africa.