ANAS. CHAULELASMUS. 135 



Genus ANAS, Brisson, Ornith. vi. p. 307 (1760). 



Anas = a Duck, in olassioal Latin ; akin to vijrra, vnaaa, vaaaa, Germ. 

 BiUte, Lith. dntis. 



Anas boscas. Wild Duck. 



Anas Boschas, Linnaus, S. N. i. p. 205 (1766). 

 Anas boschas, Macg. v. p. 31 ; Naum. xi. p. 575 ; Hewitson, 



p. 407 ; Gray, p. 193 ; Yarr. ed. 2, iii. p. 364 ; id. ed. 3, 



iii. p. 265; Gould, v. pi. 15 ; Harting, p. 63; Dresser, 



vi. p. 469. 

 The Wild Duck, Yarr. ed. 1, iii. p. 169. 



Boscas = fSocTKas, a small kind of Duck in Aristotle ; apparently the genuine 

 forms are (iaaKas au^l ^ao-cas. Origin unknown (c/. H. T. Wharton, ' Ibis,' 

 1879, p. 452) ; perhaps confused with Pouku = I feed, in popular etymology. 



Resident and generally distributed. It inhabits both the 

 Palsearctic and Nearetic Regions. 



Genus CHAULELASMUS, G. R. Gray, Gen. B. iii 

 p. 617 (1845). 



Chaulelasmiis, from ^auXos = loose or gaping ; a word only found in classical 

 Grreek in composition, ■^^avXioSovs = with outstanding teeth ; and eXao-juos = 

 metal beaten out, a metal plate, from eKavvia — I drive, strike, beat out. From 

 the projecting laminae of the upper mandible. 



Chaulelasmus streperus. Gadwall. 



Anas strepera, Linnceus, S. N. i. p. 200 (1766). 



Querquedula strepera, Macg. v. p. 59. 



Anas strepera, Naum. xi. p. 659 ; Hewitson, p. 402 ; Yarr. 



ed. 2, iii. p. 249 ; id. ed. 3, iii. p. 254 ; Harting, p. 62. 

 Chaulelasmus strepera. Gray, p. 196; Gould, v. pi. 19. 

 Chaulelasmus streperus, Dresser, vi. p. 487. 

 The Gadwall, Yarr. ed. 1, iii. p. 154. 



Streperus = noisy. 



The Gadwall occurs somewhat sparingly from autumn to 

 spring on the coasts and waters of the United Kingdom, 

 and is known to breed in Norfolk. It inhabits the Palse- 

 arctic and Nearetic Regions. 



