BIRDS — ALCIDAE — MORMON ARCTICUS. 



903 



ridge Ht iu baee, auJ two or ilireo curvi'il descemlinf; groOTes Dear (ho i-iid. unJtT iiiaiidiblo siouutb at base, and with about 

 three groovet near ita eud WiiiK rather short and weak, tail short, legs aud feet strong. 



Throat black, uniting with (he name color of the upper parts of the body. Large space on each side of the heuil and entire 

 under p»r(8, from (he throat white, freipienlly tinged with ashy about the eyes. Kntire upper parts (and throat) brownish 

 black, darker and frequently dear black ou the back. Head above frci|iii'nlly dark ashy, separated liy a well defined line from 

 (be black of the other upper parts; bill aud feet orange yellow. Sides under the wings ashy black. 



Total leiigth about Idi inches; wing, 7i, tail, 2? inches. 



Hob. — Northwestern coast of America and adjacent coast of Asia. Kamtschatka, (Mus. Acad. Philad.) 



Strongly marked by its black throat and the prominent horn over the eye. This is plainly 

 the species figured by Audubon and (roubl, and seems to be different from the succeeding, 

 M. glacialis. 



List of specimens. 



MOKMON GLACIALIS, Leach. 



Mormon glacialit. Leach, Stephens, Shaw's Zool. XIII, 1826, p. 40. 



FiouEEs — Naumann, leis, 1821, pi. VII, fig 2. 



Sp. Ch. — An elevated, short and blunt process over each eye, and under it a narrow transverse process. About the size 

 of the preceding ; general form stout ; head large ; bill much flattened laterally, entirely horny ; upper mandible composed of two 

 parts, the first at the base narrow; and covered with minute spots or granulations, terminal part with two or three curved 

 grooves in its middle, and not so near (lie end as in the species immediately preceding; under mandible with grooves corresponding 

 to those of the upper ; bill rather longer, and not so wide laterally as in the preceding species, {M. comiculata. ) Wings moderate, 

 rather weak ; tail short i legs strong. 



Throat white or pale ashy, large space on the sides of the head and under parts white, frequently tinged with ashy on the 

 former. Entire upper parts brownish black, darker on the back, and extending into a ring around the neck in front; head 

 above frequently ashy brown : bill and legs orange yellow, the former frequently dull greenish at base. 



Total length about I2J inches ; wing, fi^J to 7 ; tail, 2^ inches. 



Bab. — Northern and eastern coa.st8 of America, Northern Europe. 



Possibly the young of the preceding, and only differing from it in having the throat white 

 or light ashy, and a short obtuse horn over the eye. The specimens of this bird that we have 

 seen are from Greenland and northern Europe. 



MORMON ARCTICA, (Linnaeus,) Illiger. 



.ilea arctUa, Li.vN. Syst. Nat. I, (1766,) p. 211. 

 Mormon arclica, Illiger, Prod. 1811 — Aud. Orn. Eiog. Ill, 10.5. 

 ??.SIca labradoria, Gm. Syst. Nat. I, p. S.'iO, (1788.) 

 MomionfraUrcula, Temm. Man. II, 933. 



Figures.— Buff. PI. Enl. 275.— Nauman, Isis, 1821, pi. 7, fig. 5, G, 7, B. of Germ., pi. 33.'> -Gould, B.of Eur. V, pi. 403.— 

 AuD. B. of Am. pi. 213, Oct. ed. VII, pi. 464. 



Sp. Ch. — Smaller than either of (he preceding, but much resembling the two last species in lonn and color. A short, blunt 

 Process over each eye, and a narrow transverse process under it ; bill much lUttened laterally, lioriiy ; upper mandible composed 

 of two parts, that at the baae narrow, and covered with minute spots or granulations, terminal part with about four curved 



