140 ANATID^E. 



C. cygmis. Two examples measure 4'4 by 2' Go ; 4-42 by 2*8 

 respectively. 



1. Fort Rae, Great Slave Lake Salvin-Godmau Coll. 



(F. Clark: Henshaw Coll.}. 

 1. Labrador (Tristram Coll.). Crowley Bequest. 



Cygnus olor, Gm. 



Cygntis olor, Thien. Fortpflanz. yes. Vo'g. tab. Ixxvii. fig. 1 (1845-54); 

 Dresser, Birds Eur. vi. p. *419 (1880) ; Seebohm, Brit. Birds, iii. 

 p. 476, pi. 57 (1885); Tacz. Faune Orn. Siber. Orient, p. 1114 

 (1893) ; Salvadori, Cat. Birds B. M. xxvii. p. 35 (1895) ; Seebohm, 

 Eggs of Brit. Birds, p. 28, pi. 7. fig. 2 (1896) : Sharpe, Hand-l i. 

 p. 207 (1899). 



Olor niausuetus, Baedeke)* Eier Eur. Vo'g. tab. 63. tig. 1 (1855-63). 



Olor immutabilis, Baedeker, torn. cit. tab. 63. fig. 2. 



Cygnus immutabilis, Dresser, torn. cit. p. 429 (1880). 



The eggs of the Mute Swan are coarsely granulated and of 

 a greyish-green colour. They measure from 4*3 to 4'58 in length, 

 and from 2*85 to 3'03 in breadth. 



1. Europe, 2nd July. Salvin-Godman Coll. 



2. Europe. Seebohm Coll. 

 1. Europe, 14th May. Seebohm Coll. 

 1. Russia (E. Middendorff). Seebohm Coll. 

 6. Russia. Seebohm Coll 



1. Laid in confinement (Cambridge). Salvin-Godman Coll. 



3. Laid in confinement (Alton, Hants) . Crowley Bequest. 



Cygnus melanocoryphus (Mot.}. 



Cygnus nigricollis, Thien. Fortpftanz. ges. Vog. tab. Ixxvi. fig. 3 (1845- 

 54) ; Scl. P. Z. S. 1869, p. 629 ; id. 8r Salv. Ibis, 1870, p. 504 : 

 Durnford, Ibis, 1878, p. 400 ; Gibson, Ibis, 1880, p. 33 ; Scl. $ Huds. 

 Argent. Orn. ii. p. 124 (1889) ; James, Xeiv List Chilian Birds, 

 p. 9 (1892) ; Holland, Ibis, 1892, p. 206. 



Cygnus melancoryphus, Salvadori, Cat. Birds B. M. xxvii. p. 39 (1895) ; 

 Sharpe, Hand-l. i. p. 207 (1899) ; Nehrk. Kat. Eiersamml. p. 242 

 (1899) ; von Ihering, Rev. Mus. Paulista, iv. p. 278 (1900). 



The eggs of the Black-necked Swan are fairly smooth in texture, 

 and they vary much in size and colour. Some examples are white ; 

 others are pale buff or cream-coloured. They measure from 3*57 

 to 4'45 in length, and from 2'4 to 2*8 in breadth. 



3. Argentine Republic, Sept. A. H. Holland, Esq. [C.]. 



2. Central Chile, 4th Nov. Berkeley James Coll. 

 1. Central Chile (E. C. Reed). Berkeley James Coll. 



1. Straits of Magellan, Oct. (H. W. Berkeley James Coll. 



Hayes}. 



2. Laid in confinement (Zool. Gardens, Salvin-Godman Coll. 



London) . 

 2. Laid in confinement (Zool. Gardens, Zoological Society. 



London). 

 1. Laid in confinement (Zool. Gardens, Crowley Bequest. 



London). 



