. The structure and classification of birds . eal arid the first threebronchial semi-rings being ossi-fied ; the intrinsic muscles areattached, as in Piaya, to the Fl(t< OF piayu ca,/ana third bronchial semi-ring. (AFTER BEDDARK). Plifjcnicopliaes is much the same. The remaining genera of cuckoos whose syrinx is knownare nearer akin to Crotophaga, though in them the bronchialsyrinx is not quite so typical. In Centropus ateralbus, forinstance, the first fifteen rings of the bronchi are incompleteinternally and are closed by membrane, but the membranousarea is narrow ; this area w
. The structure and classification of birds . eal arid the first threebronchial semi-rings being ossi-fied ; the intrinsic muscles areattached, as in Piaya, to the Fl(t< OF piayu ca,/ana third bronchial semi-ring. (AFTER BEDDARK). Plifjcnicopliaes is much the same. The remaining genera of cuckoos whose syrinx is knownare nearer akin to Crotophaga, though in them the bronchialsyrinx is not quite so typical. In Centropus ateralbus, forinstance, the first fifteen rings of the bronchi are incompleteinternally and are closed by membrane, but the membranousarea is narrow ; this area widens out at the sixteenth ring,which with the following is much stronger than the pre-ceeding and succeeding rings of the bronchus ; to the sixteenthring are attached the intrinsic muscles of the syrinx. Pyr-rhocentor and Geococcyx have a similar syrinx. The syrinx ofGuira is in many respects very remarkable. On a superficialview it is not unlike that of Cuddus. The voice organ inthis genus is placed further forwards than in the genera just. •278 STRUCTURE AND CLASSIFICATION OF BIRDS considered. But the first two or three rings of the bronchusare complete rings with no membrane internally. From thefourth onwards the rings are semi-rings. Upon the sixthare inserted the syringeal muscles. Coua is somewhat inter-mediate. The first seven bronchial semi-rings have their•inner extremities separated by a narrow area of the seventh are attached the intrinsic muscles of thesyrinx. From this point commences the tympaniform mem-
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1898
