414 NATATORES. COLYMBUS. Diver. 
RED-THROATED DIVER. 
COLYMBUS SEPTENTRIONALIS, Linn. 
PLATE LXXVIII. ann LXXVIII*. 
Colymbus septentrionalis, Linn. Syst. 1. 220.—Gmel. Syst. 1. 586. sp. 3. 
—Lath. Ind. Orn. 2. 801. sp. 5.—Sabine, Frank. Jour. Ap. 703—Shaw’s 
Zool. 12. 238.—Flem. Br. Anim. 1. 133. No. 213.—Faun. Amer. 
Boreal. 2. 476. No. 234. 
Mergus guttere rubro, Briss. Orn. 6. 111. 3. t. 11. f. 1. 
Le !’longeon a Gorge rouge, Buff. Ois. 8. 264.—Id. Pl. Enl. 308. 
Plongeon Cat- Marin, ou a Gorge rouge, T’emm. Man. d’Ornith, 2. 916. 
—Lesson Man. @’Orn. 2. 359. 
Petit Plongeon, Cuv. Reg. Anim. 1. 509. 
Rothkehliger Taucher, Bechst. Naturg. Deut. 4. 609.—Meyer, Tasschenb. 
2. 453.— Red-throated Diver, Penn. Br. Zool. 2. 526. No. 240. pl. 85.— 
Arct. Zool. 2. 443.— Edwards’ Glean. t. 97.—Lath. Syn. 6. 344. 5.— 
Lewin’s Br. Birds, 6. pl. 230.—Mont. Orn. Dict. and Sup.—Bewick’s 
Br. Birds, ed. 1826, 2. p. t. 177.—Shaw’s Zool. 12. 238.—Low’s Faun. 
Orcad. 112. 
Cobble, Rennie’s Mont. Orn. Dict. 94. 
Colymbus borealis, Lath. Ind. Orn. 2. 801. sp. 6. 
Colymbus striatus, Gmel. Syst. 1. 586.—Lath. Ind. Orn. 2. 802. sp. 9. 
Striped Diver, Arct. Zool. 2. 442.—Lath. Syn. 6. 345. 6. 
First Speckled Diver, Bewick’s Br. Birds, ed. 1826, p. t. 179. 
Colymbus stellatus, Gme/. Syst. 1. 587.—LZath. Ind. Orn. 2. 800. sp. 3. 
Mergus minor, Briss. Orn. 6. 108. 2. t. 10. f. 2. 
Le Plongeon Cat-Marin, Buff: Ois. 8. 256. 
f Le Petit Plongeon, Buff: Ois, 8. 254. t. 21.—Id. Pl. Enl. 992. 
ent Speckled Diver or Loon, Br. Zool. 2. 525. No. 239.—Arct. Zool. 2. 441. 
—Lath. Syn. 6. 341.—Lewin’s Br. Birds, 6. pl. 228.—Mont. Orn. Dict. 
and Sup. 
Second Speckled Diver, Bewick’s Br. Birds, ed. 1826. p. t. 180. 
Grey Speckled Diver, Low’s Faun. Orcad. 111. 
Provincrat—Sprat Loon, Cobble, Rain Goose, Little Naak. 
Young after 
moult. 
Periodical ‘THE apparent recurvation of the bill of this species, oc- 
visitant. ¢asioned by the straitness of the upper mandible, and the 
ascending angle of the lower one and its comparative slender- 
ness and cylindrical shape, are characters of themselves suf- 
ficient to distinguish it all times from the preceding one. 
Others, however, of not less importance as regards specific dis- 
tinction, are found in the colours and disposition of the 
plumage, which, at all ages and seasons, is essentially diffe- 
rent from that of the Black-throated Diver in its whole pro- 
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