. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. MAMMALS. Zil Sthotics) squamosal, mastoid, and tympanic. These are frequently fused. The tympanic, surrounding the external auditory mea- tus may develop into a saccular auditory bulla. In- front the temporal gives off a zygomatic process which extends forward to join the jugal, or, as it is called, the malar bone. An interparietal may be distinct, as in rodents, or it may fuse with the supraoccipital, or, more rarely, with the parietal s. The frontals are usually paired, and in the ungulates they may. Fig. 346. Skull of you
. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. MAMMALS. Zil Sthotics) squamosal, mastoid, and tympanic. These are frequently fused. The tympanic, surrounding the external auditory mea- tus may develop into a saccular auditory bulla. In- front the temporal gives off a zygomatic process which extends forward to join the jugal, or, as it is called, the malar bone. An interparietal may be distinct, as in rodents, or it may fuse with the supraoccipital, or, more rarely, with the parietal s. The frontals are usually paired, and in the ungulates they may. Fig. 346. Skull of young Tatusia, from Wiedersheim ; cartilage dotted. aty, tympanic annulus; bhy, basihyal; chy, ceratohyal; cr, cricoid; d, dentary; ehy, epihyal; en, external nares; eo, exoccipital; f, frontal; hhy, hypohyal; /, jugal; in, incus; Ic, lachrymal; mk, Meckel's cartilage; ml, malleus; mx, maxillary; n, nasal; occ, occipital condyle; p, parietal; fa, palatine;/j-, premaxilla; sq, squa- mous part of temporal; st, stapes; stm, stapedial muscle; so, supraoccipital; th, thyroid cartilage; tr, trachea; //, V, passages of nerves. develop bony horns. Frequently each gives off a postorbital process which, approaching or meeting the jugal, partially or completely separates the orbit from the temporal fossa. Post- frontals are lacking. The cranium is closed in front by the ethmoid bone in which may be recognized a median (mesethmoid) plate which divides the nasal ca\'ity into right and left halves, and on either side a lamina cribrosa perforated for the passage of the olfactory 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 Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
Size: 1814px × 1378px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyorkhholtandcom
