. The structure and classification of birds . FIG. 143.—SYHINX OF Pctro VIEW. (AFTER GARROD.) FIG. 144.—SYHINX OF SAME. BACKVIEW. (AFTER GARROD. cavity, but pass close to the carina sterni and are insertedat the very end of the sternum. The syrinx of gallinaceous birds has been chiefly studiedby GAEEOD. From his paper the following account of this 1 On the Conformation of the Thoracic Extremity of the Trachea in theClass Aves, Pt. 1, The Galling, P. Z. S. 1879, p. 354. GALL1 295 organ has been mainly drawn. The simplest form of thesyrinx is seen in the peacock (fig. 143), where
. The structure and classification of birds . FIG. 143.—SYHINX OF Pctro VIEW. (AFTER GARROD.) FIG. 144.—SYHINX OF SAME. BACKVIEW. (AFTER GARROD. cavity, but pass close to the carina sterni and are insertedat the very end of the sternum. The syrinx of gallinaceous birds has been chiefly studiedby GAEEOD. From his paper the following account of this 1 On the Conformation of the Thoracic Extremity of the Trachea in theClass Aves, Pt. 1, The Galling, P. Z. S. 1879, p. 354. GALL1 295 organ has been mainly drawn. The simplest form of thesyrinx is seen in the peacock (fig. 143), where the modificationof rings at the bifurcation is of the slightest. The last twotracheal rings are partly fused behind. The accompanyingseries of illustrations () show some of the princi-pal forms of syrinx among the Alectoropodes, in which it will. FIG. 145.—SYHIXX OF Callipepla califor-nica. FRONT VIEW. (AFTER GAHKOD.) FIG. SYIUNX OF SAME. BACKVIEW. (AFTER GARROD.) be noticed that intrinsic muscles are but occasionally present they do not descend to the bronchi, but ceaseupon the trachea some way in front of the bifurcation. Themost remarkable modification of the intrinsic muscles is inCallipepla calif or nica (figs. 145, 146), where the musclesdescend the trachea posteriorly, and are inserted on to thebronchidesrnus. This state of affairs is not unlike what isfound, and will be described (see belowr), in the condor. It isuncertain whether these muscles may be not more accurately 296 STRUCTURE AND CLASSIFICATION OF BIRDS referred to the cleido-tracheal extrinsic pair (see below). Avery singular syrinx is that of the male Tetrao tetrix (fig. 147).On each side of the trachea at the lower end is an immenseirregular tumefaction, connected with its fellow by a bridgeof fatty tissue. It appears to be mucous in it
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1898
