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577. Diomedea exulans, Linn Yol. VII. PL 38. 
The weight of this species varies from seventeen to twenty 
pounds, and the expanse of its extended wings averages the enor- 
mous breadth of 1 1 feet. 
578. Diomedea brachyura, Temm. 
579. Diomedea cauta, Gould . 
580. Diomedea culminata, Gould 
581. Diomedea chlororhynchos, Lath. 
582. Diomedea melanophrys, Temm. 
583. Diomedea fuliginosa .... 
584. Diomedea gibbosa, Gould . 
Yol. VII. PL 39. 
Yol. VII. PL 40. 
Yol. VII. PL 41. 
Vol. VII. Pl. 42. 
Vol. VII. PL 43. 
Yol. VII. PL 44. 
Diomedea gibbosa , Gould in Ann. and Mag. of Nat. Hist., vol.xiii. 
p. 361. 
Face, ear-coverts, chin, abdomen, upper and under tail-coverts 
white ; the remainder of the plumage very dark brown, approaching 
on the occiput, back of the neck and wings to black ; bill yellowish 
horn-colour, becoming darker at the tip and at the base ; feet in the 
specimen dark brown, but doubtless of a bluish gray, inclining to 
flesh-colour in the living bird. 
The above is the description of a specimen in the collection of 
the Zoological Society of London, to which it was presented by 
F. Debell Bennett, Esq , who had procured it in the North Pacific. 
It differs from every other that has come under my notice in the 
peculiar swollen and raised form of the base of the upper mandible, 
which moreover rises high upon the forehead. 
585. Diomedea olivaceorhyncha, Gould. 
Diomedea olivaceorhyncha , Gould in Ann. and Mag. of Nat 
Hist., vol. xiii. p. 361. 
I propose this name for a species, examples of which are wanting 
to our collections, and of which a bill only has as yet come under 
my notice. It is in the possession of Sir Wm. Jardine, Bart, is 
3 inches and -fths long from the gape to the tip, of a uniform olive- 
green, and in form more slender and elegant than that of the other 
members of the genus. The locality in which it was procured is not 
known, but it is supposed to have been obtained in the China seas. 
The two last species were not seen by me in the Australian seas, 
but are given in order to complete a monograph of the Diomedece . 
Genus Procellaria. 
Of the fifteen species I have placed in this genus as now restricted, 
figures of only eight have been given. 
586. Procellaria gigantea Vol. VII. Pl. 45. 
587. Procellaria TEquinoctialis. 
588. Procellaria conspicillata, Gould . . . Vol. VII. PL 46. 
589. Procellaria hasitata, Kuhl ..... Vol. VII. PL 47. 
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