(syn. Pachyptila Ϯ Fulmar Prion P. crassirostris) Portmanteau of genera Fulmarus Stephens, 1826, fulmar, and Prion Lesson, 1829, prion; "I have pointed out that I consider Coues's generic description to apply to this genus, rather than to the succeeding Heteroprion; if my reasoning should be considered invalid and Pseudoprion should be utilised for my genus Heteroprion, I would propose that Fulmariprion be then resorted to for the genus I have here described, and I would select as type, my subsp. Pseudoprion turtur crassirostris, hereafter described. I here give figures of the bill of Pseudoprion turtur crassirostris and Heteroprion belcheri, for comparison. Note the extreme development of the bill of the former, so that it recalls at once that of the Fulmar" (Mathews 1912).