. Key to North American birds [microform] : containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland. Birds; Ornithology; Oiseaux; Ornithologie. partly over onch other on ftltprnate sides is something like that upon which a cooper fastens the ends of any one barrel-hoop without any nailing or tying. The rings arc in some hinls perfectly cartilaginous: iu most they becdino osseous. The trachea is moved by liitcial muscles, which not only shorten the tulic liy approximating
. Key to North American birds [microform] : containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland. Birds; Ornithology; Oiseaux; Ornithologie. partly over onch other on ftltprnate sides is something like that upon which a cooper fastens the ends of any one barrel-hoop without any nailing or tying. The rings arc in some hinls perfectly cartilaginous: iu most they becdino osseous. The trachea is moved by liitcial muscles, which not only shorten the tulic liy approximating the rings, but also diiii; tiic whole structure backward, by tlieir attach- ment to the clavicle and sternum. Tlic strip, Fi<! n-. -1, 2. Mt imnd. two trnrhciil rinss, popa- """ two Strips, of nuisdo lying uinm each side rivte, UN ill iiK, !h;, //, 1, 'A riijiit liuml, tlic siiiiie put of the trachea, is the contractor traclwic (fig. togutlier, UK 111 lli;. OC, n. (After Macgillivray.) ,â, ⢠. \ .i . » ⢠â , ' t. J ' ]oi, 1, ss, ss); the most anterior, when tlicre lire two, as soon as it leaves the tube to go to the clavicle, becomes the cJcido-truclmilis, nr ckido-hi/oid, fig. 101, ', /, /; the other is similarly the sterno-trachadis. The latter may lie a direct continuation of the contracior, as in tig. 101, 1. the loose strips under (/, or ajiiiarciilly arise separately from the side of the lower end of the tube, as in fig. lOl, ', e. (Other muscles are to be descrilied with the larynx sn|)erior and inferior.) The trachea is long in liinls, pio- jiortionate to tiie extension of the necit; it is very flexiious, fidlowing with ease the bcmls of the neck in which it lies so loosely. Its cross section is oval or circular; but all that i(l:itc-3 to the configuration and of the pipe requires sjiecial description,âso variable is tlio organ in ditt'erent birds. It is subject to dilatations and contractions in any part of its txicnt, and to devi
Size: 1500px × 1666px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectbirds, bookyear1884
