542 Capt.SaBiNe’s Memoir on the Birds of Greenland, 4c. 
16. CotymBus SEPTENTRIONALIS. Red-throated Diver. 
C. Septentrionalis. Fabr. 95. Temm. 602. 
s MATURE. C. Septentrionalis. Gmel.i. 586. Lath. Ind. Orn. ii. 801. Müll. 
no. 153.—C. Lumme. Briin. no. 132.—Red-throated Diver. Lath. Syn. vi. 344. 
Arct. Zool. ii. 520. Br. Zool. ii. 169. Mont. Dict. Supp. & App. 
. BIRDS OF THE FIRST YEAR. C.Stellatus. Gmel. i. 587. Lath. Ind. Orn. ii. 
800. Brün. no. 130. Müll. no. 159.—Speckled Diver. Lath. Syn. vi. 341, Br. 
Zool. ii. 168. Arct. Zool. ii.519. Mont. Dict. & Supp. 
BIRDS OF THE SECOND YEAR. C. Striatus. Gmel. i. 586. Lath. Ind. 
Orn. ii. 802.—C. Borealis. Brün. no. 131. Lath. Ind. Orn, 31. 801.—Striped Di- 
ver. Arct. Zool. ii. 519. Lath. Syn. vi. 345. 
Killed June 30, on the west coast of Greenland, in lat. 71°. The 
rich chesnut marking on the throat is conical in shape, having the 
apex, which is sharply pointed, at the throat, and the base resting 
on the white of the breast; the back of the specimen is slightly 
sprinkled with white spots, showing that it is a bird of the third or 
fourth. year. Following Temminck, the Colymbus Stellatus and 
Striatus, with their synonyms, are here introduced as the imma- 
ture birds of the present species: Fabricius was aware of the 
change of plumage, and has described the mature bird well; but 
no author before Temminck appears to have supposed that the 
Striped and i spenhled. Divers were referable to this species. 
17. STERNA HIRUNDO. Common Tern. 
S. Hirundo. Gmel.i.606. Lath. Ind. Orn. ii. 807. Fabr. 105. Müll.no. 170. Faun. 
Suec. 55. Temm. 481.—S. Paradisæa. Briin. mo. 159.—Great Tern. Wil. Am. — 
Orn. vii. 76.—Common Tern. Br. Zool. ii. 196. Mont. Dict. & Supp. 
IMMATURE. S. Hirundo. Brün. no. 151.—Common Tern. Lath. Syn. vi. 361. 
Great Tern. Arct. Zool. ii. 524, 
Abundant on the coast of Greenland. In the accounts of the 
authors who have been cited, a difference is observable in the de- - 
scription of the colour of the forehead of this species: by some 
it is represented as white, and by others as black: the specimens 
which 
