INTRODUCTION. 
xcvii 
It is but natural to suppose that this great group of birds has been created for some especial purpose, and may 
we not infer that they have been placed in the Southern Ocean to prevent an undue increase of the myriads of 
mollusks and other low marine animals with which those seas abound, and upon which all the Procellaridae mainly 
subsist ? 
Genus Diomedea, Li7in. 
Of this genus, which comprises among its members the largest of the Oceanic birds, three species range over 
the North Pacific Ocean ; and six others the seas southward of the equator. 
577. Diomedea exulans. Linn. ............ Vol. VII. PI. 38. 
The weight of this species varies from seventeen to twenty pounds, and the expanse of its extended wings 
averages the enormous breadth of 11 feet. 
578. Diomedea brachyura, Temm. . . ,, ... . . . . . . Vol. VII. PL 39. 
579. Diomedea cauta, Gould . . ... Vol. VII. PI. 40. 
580. Diomedea culminata, Gould ............ Vol. VII. PI. 41. 
581. Diomedea chlororhynchos, Lath. ........... Vol. VII. PI. 42. 
582. Diomedea melanophrys, Temm. ........... Vol. VII. PL 43. 
583. Diomedea fuhginosa Vol. VII. PL 44. 
584. Diomedea gibbosa, Gould. 
Diomedea ffibbosa, 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 dried specimen dark brown, but doubtless of a bluish grey, 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 advances high upon the forehead. 
585. Diomedea olivaceorhyncha, Gould. 
Diomedea olivaceorhyncha, Gould in Ann. and Mag. of Nat. Hist., vol. xui. 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 last two species were not seen by me in the Australian seas, but are given in order to complete a mono- 
graph of the Diomedece. 
Genus Procellaria, Linn. 
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 iEquinoctialis. 
588. Procellaria conspicillata, Gould ........... Vol. VII. PL 46. 
589. Procellaria hasitata, Kuhl Vol. VII. PL 47. 
590. Procellaria Atlantica, Gould. 
Procellaria Atlantica, Gould in Ann. and Mag. of Nat. Hist., vol. xiii. p. 362. 
2 B 
