PTERODROMA.
Tarsus rounded in front ; nares as in " Puffinus " but separated by a very fine partition ; bill shorter and comparatively higher ; 12 tail feathers.
Pterodroma moths few (Salvadori).
? Above ashy grey, browner on rump, forehead and lores white tipped grey ; a black patch in front of and beneath eye ; beneath white, sides of breast grey, under tail coverts white.
Bill black. Legs and bases of inner and middle toes with their web pale flesh, outer toe and ends of other toes with outer web black. Wing 250-273. Tarsus 31-34. Bill 25-29 (H.).
Breeds.—Madeira, Desertas, Porto Santo, and in Cape de Verde Islands.