. A monograph on the anatidae, or duck tribe. har. Bill higher than broad. Feet moderate, strong, the posterior toes not lobed. Axat. Char. Sternum moderate, furnished with large and open fissures behind : keel notproduced anteriorly, broad, not continued to the posterior margin. Pelvis of moderate size, withthe ischiadic foramina large and ovate. Os furcatorium strong, arcuated. The coracoid processstrong and short. Wings long. Ribs broad, furnished with a long process. Trachea commonly ofecpial size. The inferior larynx sometimes bulbous. Habit. The birds contained in this family feed equall
. A monograph on the anatidae, or duck tribe. har. Bill higher than broad. Feet moderate, strong, the posterior toes not lobed. Axat. Char. Sternum moderate, furnished with large and open fissures behind : keel notproduced anteriorly, broad, not continued to the posterior margin. Pelvis of moderate size, withthe ischiadic foramina large and ovate. Os furcatorium strong, arcuated. The coracoid processstrong and short. Wings long. Ribs broad, furnished with a long process. Trachea commonly ofecpial size. The inferior larynx sometimes bulbous. Habit. The birds contained in this family feed equally on the land and water ; somespecies, however, scarcely ever approach it ; the whole live almost entirely on vegetables. Theyhave a very wide geographical range, and are mostly migratory. Type. Anser. Affinities. The nearest affinity it appears to present to the following sub-family appears tobe through the genus Chenalopex. On the other hand the genus Cereopsis appears to approachthe Plectropterinee in its anatomy and habit. ] 12. GENUS I. CEREOPSIS. Ext. Char. Pedes simiiibus genere sequenti. Rostrum breve, obtusum ; culminearcuato. Nares cera tectae, magnae, et rotundatae. Anat Char. Trachea magna, complanata. Larynx inferior anseribus similis. Ext. Char. Feet as in the preceding. Bill with a cere covering the nostrils ; the culmenarched. Nostrils large, rounded. Anat. Char. The Trachea large, uniform. Inferior Larynx like that of the geese. Cereopsis. Lath. Type. Cereopsis Novce flollandice. The only anatomical notes that I know of in existence, with regard to this curious bird, arethose of Mr. Yarrell, in the Zoological Proceedings (1830, p. 25), which in giving our specificaccount of it, we cannot do better than extract. Affinities. Another rather anomalous genus, more closely connected, bowever, with thegeese than the preceding.
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Keywords: ., bookauthorlearedwa, bookcentury1800, bookdecade1830, bookyear1838
