. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. 564 RESPIRATORY APPARATUS IN BIRDS. 337. verse septum. Sometimes this septum is carried a little more forward, and then the anterior reservoir is smaller; this is most frequent in Palmipeds. At other times it inclines backwards, and the anterior reservoir is larger; this arrangement is peculiar to the Gallinacfe. And, lastly,.this partition divides the intercepted space between the diaphragms into two equal cavities : rapacious Birds offer numerous examples of this. " Behind, these reservoirs stand against
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. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. 564 RESPIRATORY APPARATUS IN BIRDS. 337. verse septum. Sometimes this septum is carried a little more forward, and then the anterior reservoir is smaller; this is most frequent in Palmipeds. At other times it inclines backwards, and the anterior reservoir is larger; this arrangement is peculiar to the Gallinacfe. And, lastly, .this partition divides the intercepted space between the diaphragms into two equal cavities : rapacious Birds offer numerous examples of this. " Behind, these reservoirs stand against the abdominal sacs, from which they are separated by the thoraco-abdominal diaphragm ; be- low, they respond to the sternal ribs and the lateral parts of the sternum ; above, to the pulmonary diaphragm ; inwards, to the thoraco-abdominal diaphragm ; outwards, to the verte- bral ribs and intercostal muscles. " A parabolic opening, situated in the middle part of the external border of the lung, or a little more behind, establishes their communication with that organ. This orifice, which is remarkable for its great dimensions, occupies the extremity of a volumi- nous bronchial tube which follows the direction of the generating trunk, and in such a manner that this trunk appears to pass directly to- wards the posterior diaphragmatic reservoir, and to open as a canal." 6. Abdominal reservoirs (Fig. 337, 5).—"The two air-sacs situated in the abdomen present themselves, when inflated, as two enormous bladders, the capacity of each diifer- ing but little from the volume of the trunk. Situated between the superior and lateral parietes of the abdomen on one side, and the abdo- minal viscera on the other, they cannot be dilated without driving the intestinal mass downwards and inwards. " Their anterior extremity, con- tinuous with the lung, is somewhat inflected to pass under the fibrous arch extending from the spine to the pelvis. " Their posterior extremity, d