. A text-book of agricultural zoology. Zoology, Economic. THE SKELETON AND ANATOMY OF BIEDS. 339 cavities are more or less connected with, the air, and the bones are spoken of as " pneumatic " bones. The vertebrae of the neck (fig. 175, A-B) allow the bird con- siderable powers of movement in that region; they vary from eight to as many as twenty-three. The dorsal vary from six to ten (B-G), the first four being anchylosed together (7), so as to give support to the powerful fore-limbs or wings. We cannot %%?^- OP 105 / I 1 : oc-. Fro. 176.—Skull of Fowl. PAf, Prcmaxillary; Jf, maxill
. A text-book of agricultural zoology. Zoology, Economic. THE SKELETON AND ANATOMY OF BIEDS. 339 cavities are more or less connected with, the air, and the bones are spoken of as " pneumatic " bones. The vertebrae of the neck (fig. 175, A-B) allow the bird con- siderable powers of movement in that region; they vary from eight to as many as twenty-three. The dorsal vary from six to ten (B-G), the first four being anchylosed together (7), so as to give support to the powerful fore-limbs or wings. We cannot %%?^- OP 105 / I 1 : oc-. Fro. 176.—Skull of Fowl. PAf, Prcmaxillary; Jf, maxilla; P, palatine; Jf, nasal; Z, lachrymal; 705, inter- orbital septum; OF, interorbital foramen; ZP, zygomatic process of frontal; ZP2, same of squamosal; OC, occipital condyle; TC, tympanic recess; FO, foramen ovale; ATC^ anterior tympanic recess; FJV, foramen of fifth nerve; G. quadrate; QJ, quadrato jugal; Pt, pterygoid; SA^ supra-angular; D, dentary; MF, mandibular foramen. distinguish any lumbars. The bones between the dorsal and the caudal are all united, forming the sacrum much as in mammals; but to this sacrum the ilia {S) are joined completely : thus the spine in this region and the pelvis (fig. 178) are incapable of movement. The tail vertebrae {D-E) also vary in number, usually eight to ten, and are movable. The last joint of the tail is long and slender, and forms the curious " ploughshare ". Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Theobald, Frederick Vincent, 1868-1930. Edinburgh and London, W. Blackwood and sons
Size: 1852px × 1350px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1899
