RAZOR-BILL AUK. NATATORES. ALCA. 435 



summer plumage, from a specimen in the British Mu- 

 seum. 



Length about three feet. Bill black ; four inches and a General 

 quarter long; the mandibles having transverse oblique ^ np ~ 

 furrows. In front and around the eyes is a large patch Summer 

 of white. The rest of the head, the neck, and upper P luma S e - 

 plumage, deep pitch-black. Tips of the secondaries 

 white. Greater quills black ; the longest not exceeding 

 four inches. Under plumage white. Legs having the 

 tarsi very short ; and the feet blackish-brown. 



In autumn, the cheeks, throat, fore part and sides of the winter 

 neck, become white ; and this plumage is retained till P luma g e - 

 the advance of the following spring. 



RAZOR-BILL AUK. 



ALCA TORDA, Linn. 

 PLATE LXXXIII. 



AlcaTorda,Lmn. 1. 210. l.Gmel. Syst. 1. 551 Briss.Orn. 6. 892. t. 8.f. 1. 

 Lath Ind. Orn. 2. 793. sp. 5 Flem. Br. Anim. 1. 130. No. 202. 



Utamania Torda, Leach in Cat. Br. Mus. 42. Steph. Shaw's ZooL 13. 27. 



Alca Hoieri, Raii Syn. 119. A. 3 Will. 243. t. 64. 65. 



Le Pingouin macroptere, Temm. Man. d'Orn. 2. 936 Lesson's Man. d'Orn. 

 2. 365. 



Tord Alk, Bechst. Naturg. Deut. 4. 111. Meyer, Tasschenb. Deut. 2. 34-9. 



Razor-bill Auk, or Murre, Penn. Br. Zool. 2. 509. No. 230. pi. 82 Ed- 

 ward, Glean, pi. 358. f. 2Lath. Syn. 5. 319 Id. Sup. 264 Levin's 



Br. Birds, 6. pi. 224 Mont. Ornith. Diet, and Sup Bewick's Br. Birds, 

 ed. 1826, 2. pt. 399 Flem. Br. Anim. 1. 130. No. 204. 



Common Razor-bill, Shaw's Zool. 13. 27. 



Alca Picu, Linn. Syst. 1. 210. 2 Gmel Syst. 1. 551. 



Utamania Pica, Steph. Shaw's Zool. 13. 30 Leach, Cat. Br. Mus. 42. 



Alca minor, Briss 6. 923, t. 8. f. 2. 



Mergus Bellonii, Utamania, Raii Syn. 119. 2 Will. 243. t. 64. 



Le 1'etit Pingouin, Buff. Ois. 9. 396. 



Black-billed Auk, Penn. Br. Zool. 2. 511. No. 231. Arct. Zool. 2. 426 



Lath. Syn. 5. 320. 6 Mont. Orn. Diet, and Sup Bewick's Br. Birds, 



ed. 1826, 2. pt. 402. 

 White-throated Razor-bill, Steph. Shaw's Zool. 13. 30. 



PROVINCIAL Auk, Murre, Marrot, GurfeL 



IN this species the wings are sufficiently developed for the 

 purpose of flight, being nearly of the same proportionate 



E e 2 



Young and 

 Old in 

 Winter 

 plumage. 



