WHITE-BELLIED STORM-PETREL. 
As given above, the genera Fregetta and Fregettornis ( = Cymodroma ) were 
worked up in the Twenty-second Volume of the Emu, and the conclusion 
reached that the four names given to Fregettornis all applied to the same bird. 
The next worker on grallaria was Dr. R. C. Murphy, as above. He also 
considered my three “ species ” from Lord Howe Island identical. He writes : 
“ The important point is that the Fregetta grallaria of the western South 
Pacific is a different race from that inhabiting the waters off the west coast of 
southern South America. The distinction is one of size, and the following 
figures are more revealing than pages of description.” 
He then gives measurements of five breeding males from southern South 
America as averaging :—Wing 153'9 mm., tail 72'8, exposed culmen 13• 3, 
tarsus 35'2, middle toe with claw 21’2 ; and five breeding males from Rapa 
Island, Austral Group, as averaging :—Wing 181‘6 mm., tail 82, exposed 
culmen 15'3, tarsus 40'5, middle toe with claw 25. 
“ The indicated differences are so great that they are not bridged, or even 
nearly bridged, by individual variation amongst scores of specimens studied. 
“ Kinghorn and Cayley have taken the pains to publish a sketch and 
the measurements of Vieillot’s type skin [I had already given the measure¬ 
ments of Vieillot’s type in my Birds of Australia, Vol. II., p. 41, July 31st, 
1912, as wing 150 mm. ; culmen exposed 13 ; tarsus 35 ; tail 69 ; middle toe, 
without claw 19.] These authors follow tradition in considering the seas of 
‘ Nouvelle Holland ’ as the type locality ; but their own figures contradict 
them, for the dimensions of the type match those of the Juan Fernandez 
specimens given above. Therefore, although Mathews neglected to record 
the evidence, his conclusion appears to be correct.” 
Murphy then accepts Juan Fernandez as the breeding ground of grallaria 
typical and says : “ Fledgings taken at Rapa have down of a much lighter 
grey than Juan Fernandez chicks of the same stage of growth. The contour 
feathers of the dorsal surface, which are broadly edged with white, are also 
lighter in the young Rapa birds. The difference in size is, however, the 
outstanding distinction, for downy chick from Rapa have larger bills than 
adult birds from Juan Fernandez.” 
Gould’s TJialassidroma leucogaster is a species, killed 36° S. 6° 47' E. 
South Atlantic Ocean off Cape Town, and Salvadori’s Fregetta melanoleuca 
must be revived. 
9 
