192 



but resemble them in form and colou 

 to 3 iu length, and from 1-6 to 1-9 in 



'2. Melville Island, Arctic America 



{H. Piers: Tristram Coll.). 

 1. Anderson River, Arctic Anieri'-a, 



6th July {R. MacFarlane: Smiths. 



Inst.).' 

 1 . Anderson River, 6tli J ul y ( R- MacF. .■ 



Smiths. List.). 

 4. Franklin Bay, Arctic America {R. 



MacF.). 

 1. Cambridge Ba}-, Arctic America 



(Capt. CoUinson). 

 7. Repulse Bay, Hudson's Bay, 9th 



July. 

 1. Floe-berg Beach, Lat. 82= 27' N., 



July {Col. H. IF. Feildm). 

 1. lloe-berg Beach, Lat. 82=' 28' X., 



]8tb July (H. W. F.). 

 1. Davis Straits, May. 

 1. Greenland [Holhiill). 



1. Disco, Greenland. 



(•. S.W. Greenlaiid, 20th June. 



2. Labrador. 



1. JS'ovaya Zenilva, 12th Julv. 



r. They measure from 2-42 

 breadth. 



Croyylev Bequest. 

 Salvin-Godmau 0^)11. 



Salvin-Godman Coll. 



Salvin-Godman Coll. 



Voy. II. M.S. ' Entequ-ise.' 



Dr. J. Rae [P.]. 



Voy. H.M.S. ' Alert.' 



Voy. II.M.S. 'Alert' 



Crowley Bequest. 

 Salvin-Godman Coll. 

 McCormiek Bequest. 

 Crowley Bequest. 

 Crowley Bequest. 

 Seebobm Coll. 



Sub-Family ERISMATURIN^E. 

 (ienus THALASSORNIS, Eiiton. 

 Thalassornis leuconotus {,Smitfi). 



Thalassornis leuconota, Sharpe, ed. Lai/ard's Birds S. Africa, p. 761 



(187.5-84) ; Butler, Feihlen Sf Reid, 'Zuol. 1882, p. 428. 

 Thalassiornis leuconota, Salvadori, Cat. Birds B. J/, xxvii. p. 436 (1895). 

 Thalassornis leuconotus, Sharpe, Iland-l. i. p. 226 (1899). 



The eggs of the "White-backed Duck are short ellipses and re- 

 semble those of the Ducks of the Erismatura group in haviug the 

 shell rough and granulated. They have a slight gloss and are of 

 a pale greenish-white colour. Two specimens measure respectively 

 2-6 by 2; 2 55 by 2. 



2. Newcastle, Natal, 

 {E. A. Butkr). 



18th Sept. 



Crowley Bequest. 



Genus NOMONYX, Hicljxv. 

 Nomonyx dommicus {Linn.). 



Nomonvx dominicus, Baird, Brewer S,- Ridi/w. Water Birds A'. Am. ii. 

 p. 109 (1884) ; Scl. :^- Hiids. Arqent. Orn. ii.p. 138 (1889) : Holland, 

 JIns, 1892, p. 209; Salvadori. Cat. Birds B. M. xxvii. p. 438 (189.5) : 

 Sharpe, Ha7id-L i. p. 227 (1899) ; Nehrk. Knt. Eiersamml. p. 247 

 (1899) ; von Uierinff, Rev. Mas. Patilista, iv. p. 281 (1900). 



The eggs of the Masked Duck in the Collection are of an oval 



