542 CATALOGUE—BIRDS. 
Interior Sounds on the west coast of Patagonia. 
Molina describes a Chilian duck, anas coscoroba, thus: A. rostro 
extremo dilatato rotundato ; corpore albo ; but I do not think it can 
be the same as mine, or he would have noticed its red feet and 
bill. It certainly is not A. candidus, of Viellot ; the ganso_ blanco 
of D’Azara, which the author of the article in the Dict. d’ Hist, 
Nat. xxiii. supposes to be the one and the same with A. coscoroba. 
Molina gives but a short description of that bird. 
73. ANSER INORNATUS.—Nob. in Proceedings of Zool. Society. 
Mas. Ans. albus: dorso inferiori, caudé, fasciis nuche dorsique 
superioris femorumque tectricum, pteromatibus, remigibusque atris : 
rostro nigro, pedibus flavescentibus. Foem. Capite colloque canis ; 
dorso superiori corporeque inferior: albis, nigro confertim fasciatis ; 
dorso imo remigibus, rectricibusque nigris ; ptilis speculoque albis ; 
tarsis subelongatis. 
Strait of Magalhaens. 
74, MicroprERUS BRACHYPTERUS.—Quoy and Gaimard. Zool. 
del’ Uranie, pl. 39. 
Oidemia patachonica.—Nob. Zool. Journal, iv. 100. 
Anas brachyptera.—Latham. 
Racehorse.—Cook.—Byron. 
Micropt. supra plumbeo-grisescens, abdomine albescente speculo 
alarum albo ; rostro luteo ; ungue nigro. 
75. Microprerus Patacuonicus.—Nob. in Proceedings of Zool. 
Soc. : 
Micropt. supra plumbeo grisescens ; gulé scapularibusque rufes- 
centibus ; abdomine speculoque alarum albis ; rostro virescenti- 
nigro, ungue nigro. 
Smaller than M. brachypterus. 
This bird having a smaller body than the first, is enabled to 
fly ; which with the scapulars and the feathers of the throat being 
of a redder hue than those of M. Brachypterus, authorizes its being 
considered as specifically new. 
76. ANAS NIGRICOLLIS.—Ind. Orn. ii. 834. 
This bird has a wide range on the South American continent 
It frequents the River Plata, Strait of Magalhaens, and several 
parts of the Western Coast, as far up as Childe. 
