Genus — P TERODEOMA. 
Pterodroma Bonaparte, Comptes Eendus Sci., Paris, 
Vol. XLII., p. 768, 1856 Type P, 7nacroptera. 
(Also misspelt Petrodroma.) 
jEstrelata id., ih. . . . . . . . . . . . . Type P. hasitata. 
(Also spelt (Estrelata.) 
Rhantistes Reichenbach, Nat. Syst. Vog., p. iv., 1852 . . Type P. coohii. 
(Not of Kaup, 1829.) 
CooTcilaria Bonaparte, Comptes Rendus Sci., Paris, 
Vol. XLIII., p. 994 (footnote), 1856 . . . . Type P. coohii. 
Tarsus much less compressed than in the genus Puffinus, the anterior edge 
more rounded. Claws sharply pointed. Bill less elongated, comparatively 
shorter and higher than in Puffinus. Nasal tubes close together but separated, 
openings more or less slightly directed upwards. Tail composed of twelve 
rectrices, fairly long, and more or less wedge-shaped. 
VOL. n. 
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