542 Capt. Sabine's Memoir on the Birds of Greenland, ^c. 

 16. CoLYMBUs Septentrionai-is. Jled-throated Diver. 



C. Septentiionalis. Fair. 95. Temin. 602. 



Mature. C. Septentrionalis. Gmel. '\. 5SQ. Lath. Lid. Oin. u. SOi . Millf. 

 no. 153. — C. Lumme. Brun. no. 132. — Red-throated Diver. Lath. Syn. vi. 344. 

 Jrct. Zool. ii. 520. Br. Zool. ii. 169. Mont. Diet. Siipp. Sf App. 



Birds of the first Year. C. Stellatus. Gmel. i. 587. Lath. Ltd. Om. ii. 

 800. Bruii. no. 130. itfii//. wo. 159.— Speckled Diver. Xo//i. 5yn. vi. 341. Br. 

 Zool. ii. IG8. Arct. Zool. ii. 519. Mont. Dict.S, Siipp. 



Birds of the second Year. C. Striatus. Gmel. i. 586. Lath. Ltd. 

 Orn.n. 802.— C. Borealis. Br'un. no. 131. Lath. Lid. Om. ii. 801. —Striped Di- 

 ver. Arct. Zool. ii. 519. Lath. Syn. vi. 345. 



Killed June 30, on the west coast of Greenland, in lat. 71°- "I'lie 

 rich cbesnut 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 Speckled Divers were referable to this species. 



17. Sterna Hikundo. Common Tern. 



S.Hirundo. GOTe/.i.606. Lath. Lid. Orn.u. 807. fair. 105. MM.no. 170. Faun. 

 Suec. 55. Temm. 481. — -S. Paradissea. Briin. no. 152. — Great Tern. Wil. Am. 

 Om. vii. 76. — Common Tern. Br. Zool. ii. 196. Mont. Diet. <5f Supp. 



Immature. S. Hirundo. Briin. no. 151. — Common Tern. Lath. Si/n. 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 



