904 U. S. P. R. R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
grooves ; under mandible with grooves corresponding to those of the upper. Wing moderate, or rather weak ; tail short ; legs 
robust, 
Throat white, or pale ashy; large space on each side of the head, and under parts white, frequently tinged with ashy on the 
ormer. Upper parts and ring around the neck in front brownish black, darker on the back ; head above frequently ashy brown ; 
bill and legs orange yellow, the former frequently dull greenish at base. 
Total length about 114, wing 63, tail 2; inches. 
Hab.—Northeastern coast of America, descending southwardly in the winter. Northern Europe. 
This species, quite distinct and easily recognized, appears to be restricted to the North 
Atlantic coasts of America and Europe. It is smaller than either of the preceding. 
List of specimens. 
Catal. Locality. Whence obtained, Collected by— 
No. 
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2310 lamas dolwssan=_-stacseescsesescecs||Sockee does sense eee et eee eee | Peewee dos Senceseaceetee eee 
SAGMATORRHINA, Bonap. 
Sagmatorrhina, Bonaparte, Proc. Zool. Soc. London, 1851, p. 202. 
Cxu.—Bill twice as long as high ; upper mandible straight at the base, furnished with a very large cere, incurved at the point, 
the lower mandible suddenly ascending beyond the middle, and forming an obtuse angle ; nostrils linear, margina]l.—(Bonaparte, 
as above.) 
SAGMATORRHINA LABRADORIA, (Gmelin,) Cassin. 
Alca labradoria, Gm. Syst. Nat. I, 1788, 550. 
Sagmatorrhina lathami, Bonar. Proc. Zool. Soc. London, 1851, p. 202; pl. xliv. 
Sp. Cu.—‘ The largest (of this group), blackish, beneath pale fuliginous ; bill and feet red, cereand palms black. Length 
16 inches ; bill 2 inches long, 1 inch high, $ wide at the base, % in the middle ; wing 7} inches; tail 33 inches ; tarsi 1} inches ; 
the longest toe 2% inches.’’—(Bonaparte, Proc. Zool. Soc. London, 1851, p. 202.) 
Hab.—Northwestern coast of America. 
This bird is stated by the Prince Bonaparte to be an inhabitant of the Arctic regions of north- 
western America, and he regards it as the largest of the group of which Phaleris is the type. 
The specimen described by him is in the British Museum. , 
This species has never come under our notice, though we are not without a suspicion that it 
is intimately related to Ceratorhyncha monocerata, and possibly the same. According to Bona- 
parte, this bird is also the same as Alca labradoria, Gmelin, which renders it necessary to adopt 
that name for it, unless it can be demonstrated that such name implies a geographical error, 
very dangerous to presume on in an Arctic species. 
CERORHINA, Bonap. 
Cerorhina, Bonar. Syn. 1828. Type C. occidentalis. 
Ceratorhyncha, Bonaparte, Comp. List, 1838, 66. 
Chimerina, Escuscuo.irz, Zool. At. 1829, 
Cu.—General form short and heavy ; wings rather long ; tail short ; legs and feet large and strong; tarsi short. Bill rather 
long, much flattened laterally ; upper mandible usually with an upright horny appendage at its base, which is flattened and 
obtuse at the end; angle of under mandible very distinct and generally with a groove across it, giving the appearance of an 
additional part directly on the point of the angle. 
