. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. FIG. 87.—-Chondrocranium of a frog after metamorphosis, from Gaupp. fov, fenestra ovalis; m, Meckel's cartilage; mtg, metapterygoid; nc, nasal capsule; ptgq, pterygoquadrate; tnas, tectum nasalis; tsyn, tectum synoticum; timed, taenia tecti medialis. basisphenoid are unknown. In the ethmoid region, except in the aglossa, there is a peculiar bone, the sphenethmoid, which arises as two bones on either side. These fuse, forming a ring ('os en ceinture') around the olfactory nerves and the anterior end of the brain
. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. FIG. 87.—-Chondrocranium of a frog after metamorphosis, from Gaupp. fov, fenestra ovalis; m, Meckel's cartilage; mtg, metapterygoid; nc, nasal capsule; ptgq, pterygoquadrate; tnas, tectum nasalis; tsyn, tectum synoticum; timed, taenia tecti medialis. basisphenoid are unknown. In the ethmoid region, except in the aglossa, there is a peculiar bone, the sphenethmoid, which arises as two bones on either side. These fuse, forming a ring ('os en ceinture') around the olfactory nerves and the anterior end of the brain. The frontals and parietals of a side are fused and often the fronto-parietals are continuous across the middle line. They may extend to the nasals or there may. FIG 88 —Dorsal and ventral views of skull of toad, Bufo americanus. For letters see fig. 68. be a gap between, leaving the sphenethmoid visible from above. A large squamosal extends above the quadrate, from the otic region to the angle of the jaw. The upper jaw consists of premaxillary and maxillary, and, except in the aglossa, of quadrato- jugal. The pterygoid cartilage persists, but is overlaid by a membrane bone, also called the pterygoid. Slender palatines, transverse to the axis of the skull, are Jacking only in the aglossa, while small vomers are almost always present. The. 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. Philadelphia, P. Blakiston's son & co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1912
