208 
PODICIPINJE. COLYMBUS. 
daily are met with, from one end of the island to the other. 
In summer it betakes itself to the Arctic regions. The nest 
is large and rude ; the eggs, generally three, are considerably 
elongated, three inches and three-fourths in length, two inches 
and a fourth in breadth, dull yellowish green spotted with 
dusky. The flesh is dark and unsavoury, the skin sometimes 
used for caps. 
Great Northern Diver. Greatest Speckled Diver. Im- 
mer, E miner, or Imber Goose, Gunner. Naak. Cobble. 
Colymbus glacialis, Linn. Syst. Nat. i. 221, adult, Colyra- 
bus limner, young, i. 222. — Colymbus glacialis and I miner, 
Lath. Ind. Ornith. ii. 799, 809. — Colymbus glacialis, Temm. 
Man. d ? Ornith. ii. 910. — Colymbus glacialis, King-necked 
Loon, MacGillivray, Brit. Birds, v. 
277. Colymbus arcticus. Black-throated Loon. 
Adult about two feet and a half long ; with the bill black, 
nearly straight, two inches and a half in length along the 
ridge, with the sides convex beyond the nostrils, the edges 
involute for half their length in the middle ; the fore part 
and sides of the head and throat, and the sides of the neck, 
light bluish-grey ; the upper plumage glossy bluish black, 
tinged with green anteriorly ; on the fore part of the back two 
longitudinal bands of transverse white bars ; the scapulars 
with large square white spots : upper part of fore-neck pur- 
plish black ; sides of neck dusky, streaked with white ; on 
the lower part of the neck a broad space streaked with dusky 
and white ; lower parts white, with a longitudinal dusky band 
under the wings. Young in winter with the bill bluish-grey, 
dusky on the ridge ; upper parts of head and hind-neck grey- 
ish-brown, sides of head greyish-white ; upper parts of body 
blackish-brown, the feathers edged with pale grey; lower 
parts white, the sides and lower tail-coverts greyish-brown. 
Male, 29, 40, 12J, 2-|, 3 T V, 3*, H- Female, 27, 38. 
This species is of very rare occurrence, so that specimens 
are with difficulty procured. It has, however, been found 
breeding in the Hebrides and the extreme north of Scotland. 
It is generally dispersed over the northern parts of Europe 
and America, but appears to be everywhere less common than 
the other two species. The eggs, tw r o or three, are three 
inches long, two in breadth, olivaceous, spotted with dusky. 
Colymbus arcticus, Linn. Syst. Nat. i. 221. — Colymbus 
arctieus, Lath. Ind. Ornith. ii. 800. — Colymbus arcticus, 
Temm. Man. d’Ornith. ii. 913. — Colymbus arcticus, Black- 
throated Loon, MacGillivray, Brit. Birds, v. 
