Turrep PocHarp. NATATORES. FULIGULA. 359 
tube is of considerable and equal diameter throughout its 
length ; in which respect it differs from both of them.—'The 
food of the present species consists of water insects, vermes, 
and mollusca, obtained by diving; and Montracu mentions 
having found the craws of some specimens filled with the 
Helix putris in the month of December, at which period 
these and other testaceous animals have retreated to their 
hybernacula beneath the mud, in the deeper parts of the wa- 
ter. These birds begin to leave us early in March, and by 
the middle of April the whole have departed for more north- 
ern latitudes. According to Dr Fiemrine, they only appear 
in the Orkney and Shetland Islands after stormy weather ; 
their proper line of migration seeming to be more to the 
eastward. 
Pate 65. represents the Adult Male of the natural size. 
Head and upper part of the neck black, glossed with rich 
purple. Crest the same, composed of long silky nar- 
row decumbent feathers. Lower part of the neck and 
breast black. Belly, abdomen, sides, and flanks pure 
white. Mantle and scapulars brownish-black, with very 
minute specks of reddish-white. ‘Tertials glossy green- 
ish-black. Secondaries white, tipped with greenish- 
black, forming a bar or speculum across the wings 
when closed. Quills pale hair-brown, with the outer 
webs and tips black. Lower part of the back, under tail- 
coverts, and tail, black. Bill, from the angle of the fore- 
head to the. tip, one inch and a-half in length ; breadth 
seven-eighths of an inch; deep bluish-grey, with a 
small part of the tip and the nail black. Legs and toes 
greyish-black, with the membranes still darker. 
Head and neck deep umber-brown ; with a crest of the 
same colour, about an inch long. Breast and flanks va- 
ried with umber-brown and yellowish-brown. Belly 
and abdomen white, with faint undulations of pale 
brown. Vent and under tail-coverts barred with white 
and pale umber brown. Upper parts of the body 
Food. 
General 
descrip- 
tion. 
Male. 
Female. 
