424. Dr. A, Halt on the Mammals and Birds 



A. perspicillata. Black or surf duck. 

 Fuligula perspicillata of Bonaparte ! 

 Oidemia perspicillata of Richarckon and Swainson ! 

 Pelionetta perspicillata, Baird ! 

 D.c. Bill reddish orange ; the nail paler ; a square black spot 

 on the lateral protuberance ; legs orange ; the webs blackish 

 brown ; irides yellow ; eggs 4 to 6, white. 



Dorsal and ventral aspect. Velvet black, with a reddish reflec- 

 tion ; a broad white band between the eyes, and a triangular 

 patch of the same on the nape ; throat brownish ; no speculum ; 

 female sooty brown, whitish near the bill and auriculars. 



Length 24 inches ; the wing 9j- inches ; the bill above, 1 inch 

 4^ lines ; tarsus 1 inch 3 lines. This bird is occasionally met 

 with. A specimen exists in the museum of the Natural History 

 Society. 



A.fusca. Velvet duck. 

 Fuligula fu sea of Bonaparte ! 

 02c?emia/«sca of Richardson ! 

 Melanetta velvetina. Baird ! 

 v.s.p. Bill, protuberance, posterior part of the upper mandible, 

 margins, and a spot at side of the tip, black ; the rest orange ; 

 legs scarlet, with black webs ; irides pale yellow ; eggs 8 to 10, 

 white. 



Dorsal aspect. Blackish brown, of a velvety hue and feel ; a 

 crescent of white on the lower eyelid, extending behind the eye ; 

 speculum white. 



Ventral aspect. Throat and breast blackish brown, and velvety 

 like the back ; belly, vent, and sides, sooty brown, — brightest on 

 the sides. 



1st primary longest; length 24^ inches; alar exoanpc 38 

 inches ; length of bill from the frontal feathers, and along the 

 protuberance, 1 inch 10 lines ; from the rictus to the tip 2 inches 

 and 10 lines. 



A young bird in the museum of the Natural History Society is 

 wholly sooty brown, with greyish white on the auriculars, lower 

 eyelid, and on the toes. It measures 21^ inches long, and its 

 bill is wholly black, and the protuberance but very slightly ele- 

 vated. This bird is common iti the spring of the year. 

 Sub-genus Harelda. 

 Sub gen. Char. Bill short, tip much arched, high at the base ; 

 laminae distant, prominent, and cutting, lower ones divided into 



