MABMARONETTA 241 



Genus MARMARONETTA. 



The genus Marmaroiietta contains a single species only, with a 

 bill similar to that of Nettlon, but differing from that genus in having 

 no wing-speculum. Its colouration, which gives a silvery-grey tone 

 to the plumage when taken as a whole effect, is quite sufficient to at 

 once distinguish it from all other ducks, either Indian or otherwise. 



(37) MARMARONETTA ANGUSTIROSTRIS. 

 THE MAEBLED DUCK. 



Anas angUBtirostris, Menetries, Cat. Bets. Caucus, p. 58 (1832) 



(Lenkoran). 

 Querquedula angustirostris, Hume, S. F. i, p. 262 ; Anderson, ibid, iii, 



p. 273 ; Butler, ibid, iv, p. 30 ; id. ibid, v, p. 234 ; Hume cO Marsh. 



Game-B. iii, p. 237 ; Beid, S. F. x, p. 82 ; McLeod, ibid. p. 168 ; 



Hume, ibid. p. 171. 

 Chaulelasraus angustirostris, Hume, S. F. vii, p. 493 ; id. Cat. No. 961 



bis; Barnes, B. of Bom. p. 405 ; Hume, Nests and Eggs (Gates' ed.), 



iii, p. 291 ; Barnes, J. B. N. H. S. vi, p. 291. 

 Marmaronetta angustirostris, Salvadori, Cat. B. 21. xxvii, p. 321 ; Blan- 



ford. Avifauna B. I. iv, p. 454; Oates, Game-B. ii, p. 273; Stuart 



Baker, J. B. N. H. S. xii, p. 459 (1899) ; id. Indian Dticks, p. 202 



(1908) ; Burton, J. B. N. H. S. xxi, p. 684 (1912) ; Aitken, ibid, xxii, 



p. 807 (1914) ; Logan-Hume, ibid, xxiii, p. 584 (1915) ; Ludloio, ibid. 



xxiv, p. 368 (1916) ; Berthou, ibid, xxvi, p. 674 (1919). 



Description. Adult Male. — Whole upper parts a silvery-grey, each 

 feather having the central portion darker and brownish and the tip and 

 terminal edge paler ; the head and nape are more buff in tint, and have each 

 feather centred brown, giving a barred appearance ; the pai'ts surrounding 

 the eye brown, forming a distinct dark-brown eye-patch ; chin, throat and 

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