34 



^ Suckl. N. H. Wash. Terr. p. ^48 (1860) ; Wheat. Ohio Agric. 

 Rep. no. 234 (1860) (Lake Erie) ; Hayd. Rep. p. 175 (1862) (Yel- 

 lowstone) ; Blakist. Ibis, 1862, p. 9 ; Ross, Canad. Natural, vii. 

 p. 151 (Mackenzie River) (1862) ; id. Nat. Hist. Rev. (2) ii. p. 286 

 (1862) ; RlaMst. Ibis, 1863, p. 136 ; Sclat. P. Z. S. 1866, p. 203 

 (Zool. Gard.) ; Schleg. Mus. P.-B., Anseres.p. 83 (1866) ; Mwrie, 

 P. Z. S. 1867, pp. 6, 11, 12, 13: Hincks, P. Z. S. 1868, pp. 211- 

 213 ; Broivn, Ibis, 1868, p. 425 (Vancouver Isl.) ; Ball S,- Bann. 

 Tr. Chic. Acad. i. p. 294 (1869) (Frazer River and Yukon) ; Tumb. 

 B. E. Pa. p. 45 (1869) (Chesapeake Bay) ; Eyton, Syn. Anat. 

 p. 49 (1869); Sclat. P. Z. S. 1870, p. 664 (Zool. Gard.) ; Trippe, 

 Pr. Ess. Inst. vi. p. 119 (1871) (Minnesota) ; Merr. U.S. Geol. 

 Surv. Terr. p. 703 (1872) (Wyoming) ; Gieb. Thes. Orn. i. p. 855 

 (1872) : Coues, Key, p. 281 (1872) ; id. Check-list, n. 476 (1873) ; 

 Snoic, B. Kans. p. 11 (1873) (Iowa) ; Garrod, P. Z. S. 1873, p. 467 

 (carotids), p. 639; Ridc^w. Ann. Lye. N. Y. x. p. 388 (1874) (Illi- 

 nois) ; Coiies, Birds N.- W. p. 544 (1874) ; Admns, Ibis, 1878, 

 p. 430 (Michalaski) ; Sclat. P. Z. S. 1880, p. 506 ; Forbes, P. Z. S. 

 1882, p. 352; Cmies, Check-list, 2nA ed. p. 110, n. 688 (1882); 

 Rchmv. Orn. Centralbl. 1882, p. 39 ; id. Voq. Zool. Glirt. p. 70 

 (1882) ; Huet, Bull. Soc. Zool. Fr. 1882, p. 353 (breeding in cap- 

 tivity); Sclat. ListVert.An.Qih ed. p. 424, n. 946 (1883); B. 0. U. 

 List Br. B. p. 121 (1883); Cottes, Key N. A^n. B. 2nd ed. p. 682 

 (1884) ; Saund. Yai-reW s Hist. Br. B. iv. p. 322 (1884-85) ; ?Babingt. 

 B. of Suf. p. 243, pis. v., vi. (1886) ; Sharpe, Cat. Osteal. Specim. 

 Coll. Surg. iii. p. 296 (1891). 



Olor buccinator, Wagl. Isis, 1832, p. 1234 ; Bp. Compt. Rend, xliii. 

 p. 648, n. 6 (1856) ; G. R. Gr. Hand-list, iii. p. 78, n. 10603 

 (1871) ; Ridgic. Norn. N. Am. B. n. 589 (1881) ; Stejn. Pr. U.S. 

 Nat. Mm. v. p. 216 (1882) ; B., B., <^- R. Water-Birds N. Atn. i. 

 p. 430 (1884); A. O. U. Code of Norn. S,- Check-list, p. 130, u. 181 

 (1886) ; Ridgw. Man. N. Am. B. p. 120 (1887) ; Macfarl. Pr. 

 U.S. Nat. Mus. xiv. p. 425 (nest and eggs) (1891) ; Hatch, B. of 

 Mimies. p. 83 (1892). 



Cygnus passmori, Hincks, Journ. Linn. Soc. viii. p. 1 (1864) 

 (Toronto) ; Murie, P. Z. S. 1867, pp. 8-13 ; Hincks, P. Z. S. 

 1868, p. 211 ; Coues, Key N. A. B. p. 281 (1872). 



Olor passmorii, G. R. Gr. Hand-list, iii. p. 78, n. 10604 (1871) ; 

 Boucard, Cat. Av. p. 57 (1876). 



Tail usuaUy of 24 feathers ; bill longer than the head. 



Adult. Plumage entirely pure white ; the head, sometimes the 

 neck also, or even the entire lower parts tinged with rusty : biU, 

 naked lores, legs, and feet uniform deep black : iris brown. Total 

 length about 58-50-68 inches, wing 21-27-25, tail 8, culmen 4-34- 

 4-70, tarsus 4-54-4-92. 



The arrangement of the trachea in this species is very different 

 from that in C. columhianus : it has, besides the horizontal bend, a 

 vertical flexure which occupies a prominent protuberance on the 

 anterior portion of the dorsal aspect of the sternum ; further, the 

 posterior portion of the channel through which the trachea passes, 

 swells more or less into an irregular bulb. 



, Young. "In winter the young has the bill black, with the middle 

 portion of the ridge to the length of an inch and a half light flesh- 



