. The structure and life of birds. Birds; Evolution. XV CLASSIFICATION 383 into two sub-classes. One is made up of those which have keels to their breastbones, the other of those which have a rounded breastbone with no keel. The former are called Carinata: {carina — a keel) ; the latter, RatitK {ratis = a keelless boat). This separates off the Apteryx, and the Ostrich with its kin the. Fig. 75.—Sternum of Ostrich. Rhea, the Emeu and the Cassowary. Thus some ten species out of the eleven thousand arc disposed of I must now mention a few of the points that are most useful for deciding to which o
. The structure and life of birds. Birds; Evolution. XV CLASSIFICATION 383 into two sub-classes. One is made up of those which have keels to their breastbones, the other of those which have a rounded breastbone with no keel. The former are called Carinata: {carina — a keel) ; the latter, RatitK {ratis = a keelless boat). This separates off the Apteryx, and the Ostrich with its kin the. Fig. 75.—Sternum of Ostrich. Rhea, the Emeu and the Cassowary. Thus some ten species out of the eleven thousand arc disposed of I must now mention a few of the points that are most useful for deciding to which order one of the Carinatae belongs. Very important are the following questions: the presence or absence of the first toe, and the arrangement of the four toes when all are. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Headley, F. W. (Frederick Webb), 1856-1919. London, New York, Macmillan
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1895
