. Birds .. . nd some Tracheuplwnceor there may be as many as seven pairs as in the the structure of the syrinx itself, as apart fi^om itsmusculature, has been, and still is, a feature of importance in 12 FASSSBEB. 1 he classification of the Fusseres—as witness the three types of syrinx nre recognized—the , the Tracheal and the Bronchial, the last two beingderivatives of the first. The traeheo-bronchial is the type foundin the Osoines and Sub-Osciiies. Herein the lower end of thetrachea has the lust four or five rings welded to form a little
. Birds .. . nd some Tracheuplwnceor there may be as many as seven pairs as in the the structure of the syrinx itself, as apart fi^om itsmusculature, has been, and still is, a feature of importance in 12 FASSSBEB. 1 he classification of the Fusseres—as witness the three types of syrinx nre recognized—the , the Tracheal and the Bronchial, the last two beingderivatives of the first. The traeheo-bronchial is the type foundin the Osoines and Sub-Osciiies. Herein the lower end of thetrachea has the lust four or five rings welded to form a little dice-shaped box communicating below with the bronchi. Thebroncliial rings I and II are closely attached to this box,while III forms a strong arcuate bar supporting a delicatesheet of membrane stretched between rings I and II on theone hand and IV on the other. The bronchial rings are in-complete on their inner aspects, their free ends supporting a tympanic membrane, which plays an important i)art in voice.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirds, bookyear1922
