IIL PROCELLARIIDAE 63 
depression on the top, colonies being formed on cliffs, rocky 
slopes, or bare hill-tops above the limit of trees; the Giant Petrel 
makes a similar structure at no great elevation ; Shearwaters and 
their nearest allies. collect a mass of grass and rubbish in a burrow 
scraped in a bank, among boulders, or in holes and crevices of rocks, 
accommodating themselves to little stone huts, provided by the 
fishermen, in the Canary and Salvage Islands." Fulmars scrape 
a cup-shaped hollow on ledges of precipices, adding little or no 
hning, while most of the remaining forms utilise small burrows, 
or crannies among the scattered stones which collect upon the 
shores or at the base of cliffs. A single lack-lustre white egg is 
deposited, frequently marked with a ring of rusty spots towards 
the larger end, especially in the case of the lesser species. Adult 
and young Shearwaters are eaten by the natives of the Canaries, 
the islands of Scotland, Ireland, and elsewhere, Pujinus brevicauda 
being the “ Mutton-bird” of Austraha, and P. anglorum being 
termed “ Fachach” in the Hebrides and North Ireland. In the 
case of Pelagodroma, we have positive evidence that both sexes 
incubate ;” and before the eggs are laid the parents are not un- 
commonly found together in the hole when such a site is chosen. 
Incubation lasts from twenty-five to sixty days. 
Sub-fam. 1. Diomedeinae.—This contains two genera, Phoebetria 
and Diomedea, of which the former has one member, P. fuliginosa, 
of a sooty grey colour, distinguished from its allies by the sul- 
cated mandible and cuneate tail. It frequents the South Seas, 
while straying to Oregon, as does Diomedea culminata; and 
has similar manners to other Albatroses. Diomedea exulans, the 
“ Wandering Albatros,” or “ Cape Sheep,” of the Southern Oceans 
generally, is white with narrow dusky undulations above and 
almost black wings; and particulars of the habits having been 
already given, it only remains to refer to the majestic flight, 
described by Professor Hutton as follows: “ With outstretched, 
motionless wings he sails over the surface of the sea, now rising 
high in the air, now with a bold sweep, and wings inclined at an 
angle with the horizon, descending until the tip of the lower one 
all but touches the crests of the waves as he skims over them. 
Suddenly he sees something floating on the water and pre- 
pares to alight; but how changed he now is from the noble 
bird but a moment before, all grace and symmetry. He raises 
1 Ogilvie Grant, Zbis, 1896, p. 52. 2 Td. ibid. 
