. The structure and classification of birds . een at itsextreme in certain passerines and in the parrots. Here wemeet with a multiplication of the intrinsic muscles, whichmay exist to the number of three or four pairs. A syrinx ofthis kind, when found in the Passeres, is frequently termedoscinine, the group of Passeres exhibiting the character beingthe Oscines, a term, however, which is not now used in theclassification of the group. On the Trachea of the Tantalus loculatc& and of VaMellus cayennensis,P. Z. 8. 1878, p. 625. RESPIRATOEy SYSTEM 67 In Menura superba, which has been described by G
. The structure and classification of birds . een at itsextreme in certain passerines and in the parrots. Here wemeet with a multiplication of the intrinsic muscles, whichmay exist to the number of three or four pairs. A syrinx ofthis kind, when found in the Passeres, is frequently termedoscinine, the group of Passeres exhibiting the character beingthe Oscines, a term, however, which is not now used in theclassification of the group. On the Trachea of the Tantalus loculatc& and of VaMellus cayennensis,P. Z. 8. 1878, p. 625. RESPIRATOEy SYSTEM 67 In Menura superba, which has been described by GarKod.,there are three, pairs of muscles, which are attached todifferent bronchial semi-rings; the posterior pair of musclesare attached to a ring below that which bears the insertionof the anterior pair, while the remaining middle pair areinserted higher up again. We now come to the consideration of those modificationsof the, syrinx which will be spoken of neither as degenerationsnor complications. They are parallel modifications, which. Fig. 46.—The Same from behind (after Gaebod). can in all cases be traced to the typical tracheo-bronchialsjTrinx, though whether they have originated from it is, ofcourse, a matter of question. To the two varieties of syrinxwhich we briefly refer to here the names tracheal andbronchial syrinx have been given, implying the fact thatthe modification of the windpipe has taken place in theone case mainly or entirely in the trachea, and in the othermainly or entirely in the bronchi. The tracheal syrinx is distinctive of a group of Passereswhich have been on that account called the Tracheophonse ; f2 STEUCTDRE AND CLASSIFICATION OF BIRDS but a syrinx that presents some of the same characteristicmodifications distinguishes the stork tribe. The principal modification of this type ofsyrinx is that a large numberof tracheal rings are alteredin character, in a way whichwill be pointed out in detailfor one or two forms. Thetracheal syrinx of the Passere
Size: 1358px × 1839px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1898
