NATURAL SCIENCES OF PHILADELPHIA. 29 



Cerorhina orientalis, Brandt, Bull. Acad. St.-Petersb. ii, 1837, p. 348. By a 



lapsus calami for " occidentalis." 

 C'himerina cornuta, Eschschollz, Zool. Atlas, 1829, iii, p. 2, pi. 12. 



American and Asiatic coasts and islands of the North Pacific. Japan (Perry's 

 U. S. Expl. Exped.), Kamtschatka (Mus. Acad., Philada.), Pacific coast of N. 

 A. from Russian America to Farralone Islands, Cal. (Mus. Smiths. Inst.) Breeds 

 as far south as Japan and California. 



Fig. 1. — C mnnoccrata. Fig. 2.—C. rnonocerata. 



Nat. size. Adult female. Nai size. Young scarcely fledged. 



Adult, breeding plumage, (No. 46,517, Mus. Smiths. 9 i Sitka, May, 1866).' — Bill 

 orange-yellow, culmen and base of upper mandible dusky ; horn dull yellowish. 

 Feet apparently dusky yellow ; below, with the tarsi posteriorly, blackish ; claws 

 black. Crown of head, back of neck, and entire upper parts glossy blue-black . 

 Sides of head and neck, and of body along under the wings to the tianks, with 

 chin, throat and upper part of breast, and under surfaces of wings, clear gray- 

 ish ash, pretty trenchantly defined along its line of junction with the black. 

 Under parts from the breast pure white ; this color shading insensibly into the 

 ashy on the breast and sides. A line of white along the edge of the fore-arm. 

 Exposed portions of wing and tail feathers black; their inner webs greyish- 

 brown, basally lighter, the shafts of the primaries dull whitish at base. A 

 series of elongated, stiffish, acicular feathers on the side of the head from the 

 rictal angle ; another similar series from the eye backwards to the sides of the 

 nape, pure white. The individual feathers are about an inch, more or less, in 

 length ; the length of the white stripes produced by them collectively is about 

 two inches. 



Length 15-50; wing 7-25; tail 2-50; tarsus 1-20; middle toe and claw 1-85, 

 outer do. 1-70, inner do. 1-40; chord of cuimen, excluding width of horn, 1-00, 

 including it 1-40 ; rictus 2-00 ; gonys, including length of accessory piece, 1-10 ; 

 height of bill from tip of horn to protuberance at symphysis 1'25 ; from culmen 

 at base of horn to same -80; nostril to top of horn '75. 



Immature, but with a perfectly developed horn, and accessory symphyseal 

 piece (No. 23,391, Mus. Smiths., Straits of Fuca). — Colors somewhat as in the 

 preceding ; but the white of the under parts everywhere obscured by ashy-gray, 

 which tinges the tips of the feathers, giving a marbled aspect to the parts, 

 lightest on the middle of the belly, shading insensibly on all sides into the 

 uniform ashy-gray of the other under parts. Black of upper parts, es])ecially 

 on the head, with a decided brownish tinge. Only traces of the acicular white 

 feathers on the sides of the head. Bill smaller than before ; the horn, how- 

 ever, perfectly developed, rising nearly half an iach above the culmen. Rather 



1868.] 



