The syrinx or lower larynx is the most interesting and absolutely avine modification, although absent as a voice-producing organ (probably due to retrogression) in most Ratitae, storks, turkey buzzards (Cathartes) and Steganopodes.
The syrinx is a modification of the lower part of the trachea and of the adjoining bronchi.
According to the position of the chief sound-producing membranes, three types of syrinx are distinguishable: - (i) Tracheo-bronchial, by far the commonest form, of which the two others are to a certain extent modifications.
(2) Syrinx bronchialis.
(3) Syrinx trachealis.
The Tracheophonae among the Passeriformes, the possessors of this specialized although low type of syrinx, form a tolerably well-marked group, entirely neotropical.
But indications of such a syrinx occur also in Pittidae, pigeons and gallinaceous birds (Gallidae), the last cases being clearly analogous.
Whilst the type of syrinx affords no help in classification, it is very different with its muscles.
There remains but one logical way, namely, to distinguish as follows: - (i) Passeres anisomyodi, in which the syrinx muscles are unequally inserted, either on the middle or on one end of the semi-rings, either dorsal or ventral.
(2) Passeres diacromyodi, in which some of the syrinx muscles are attached to the dorsal, and some to the ventral ends, those ends being, so to say, equally treated.
This way of using the characters of the syrinx for the classification of the Passeriformes seems simple, but it took a long time to accomplish.
Garrod, " Major Divisions of Passerine Birds (syrinx, &c.)," P.Z.S., 1876, pp. 506519; and " On the Conformation of the Thoracic Extremity of the Trachea in the Class A y es," P.Z.S., 18 79, pp. 357-3 80; Muller, Stimmorgane der Passerinen, Mailer's Arch.
Forbes, " ` Contributions to the Anatomy of Passerine Birds (syrinx)," P.Z.S., 1880, pp. 380386, 387-391; 1881, pp. 435-737; 1882, PP544-54656 9-57 1 W.
- Syrinx muscles entirely lateral or attached to the dorsal or ventral corners of the bronchial semi-rings.
- Syrinx muscles of either side attached to the dorsal and ventral corners of the rings.
1, pp. 186-256, 308-352) an essay in two parts, wherein, following the researches of Muller 2 on the syrinx, in the course of which a correlation had been shown to exist between the whole or divided condition of the planta or hind part of the " tarsus," first noticed, as has been said, by Keyserling and Blasius, and the presence or absence of the perfect song-apparatus, the younger author found an agreement which seemed almost invariable in this.
The sternum has no keel, and ossifies from lateral and paired centres only; the axes of the scapula and cora.coid have the same general direction; certain of the cranial bones have characters very unlike those possessed by the next order - the vomer, for example, being broad posteriorly and generally intervening between the basisphenoidal rostrum and the palatals and pterygoids; the barbs of the feathers are disconnected; there is no syrinx or inferior larynx; and the diaphragm is better developed than in other birds.'
SYRINX (Î£Ï…ÏÎ¹Î³Î¾), the Greek name for the pan-pipes.
The syrinx consisted of a varying number of reeds, having their open ends or embouchures in a horizontal line and their stopped ends, formed by the knots in the reed, gradually decreasing in length from left to right.
The syrinx or pan pipes owes its double name to ancient Greek tradition, ascribing its invention to Pan in connection with a well-known legend of the Arcadian water-nymph "Syrinx."
The syrinx was in use during the middle ages, and was known in France as frestel or fretiau, in medieval Latin as fistula panis, and in Germany as PansflÃ¶te or Hirtenpfeife (now PapagenoflÃ¶te).
The modern mouth-organ is the representative of the syrinx, although blown by means of a free reed.
A lover of music, he invented the shepherd's pipe, said to have been made from the reed into which the nymph Syrinx was transformed when fleeing from his embraces (Ovid, Metam.