216 
ANAS RUBIDUS. 
much larjrcr about three quarters of an inch abore n hef® 
it separates into the two lobes of the lungs ; this 
was larger than a Spanish hazel nnt, flat on one 
and convex on the other. The protuberance on e*‘ , 
side of the bill communicated with the nostril, and 
holloiv. All these were probably intended to contiO® 
supplies of air tor the bird’s support while under wnt'^'^i 
the last may also protect the head from the sharp edj'’' 
of the shells. 
The female is altog-ether of a .sooty broivii, light'’’' 
about the neck ; the prominences on the bill are scarce'? 
observable, and its colour dusky. 
This species was also fouiid by Captain Cook 
Nootka Sound, on the northwest coast of America. 
272 > ANAS JtWUIDUSf WILSON. —RUDDY DUCK. 
WILSON, PLAXE LXXI. FIG. V. MALE. 
The specimen from which this very rare duck 
described w.xs shot some years ago, on the river DelaW.at^’ 
and ajipear.s to be an entire new species. The feiiit*'^' 
described in the next article, was killed in the san’J 
river; and they are the only individuals of their kin'*’ 
have met with. They are both preserved in the siip^ . 
museum of my much respected friend, Mr Peale, of tl‘>* 
city. 
On comparing this duck with the description gi;'*’® 
by Latham of the Jamaica shoveller, I nas at h’*' 
inclined to believe I had found out the species; b'd* 
more cai-eful examination of both satisfied me that 
cannot be the same, as the present differs eonsidcraj’Y 
in colour; and, besides, has some peculiarities "hk’® 
the eye of that acute ornitliologist could not possib|.’ 
have overlooked, in his e.xaraination of the species si'k 
to have been received bv him from .Jamaica. Where*'*^ 
the genera residence of this species mav be, in this pa^ 
ol the world, at least, it is extremely rare, since 
the many thousands of ducks brought to our marks'^ 
during winter, 1 have never heard of a single individi"** 
of the present kind having been found among them. 
