. A dictionary of birds . Analytical Dlagram of a Birds Skull. Prremaxilla; (2) the light and left Maxilkc; (3, 4, 5) the rightand left Palatines, Pterygoids and Quadrates—these being, as wellas (6, 7) the right and left Jugals and Quadrato-jugals, modifica-tions of the dorsal half of the first visceral arch; (8) the bonesforming the right and left Mandibulpe (or the lower jaw)—namely,the Dentals, Splenials, Supra-angulars, Angulars and Articulars—allthese last being modifications of the ventral half of the same (first)visceral arch; (9) the ossicles of the eai, columella anris (p. 179),.
. A dictionary of birds . Analytical Dlagram of a Birds Skull. Prremaxilla; (2) the light and left Maxilkc; (3, 4, 5) the rightand left Palatines, Pterygoids and Quadrates—these being, as wellas (6, 7) the right and left Jugals and Quadrato-jugals, modifica-tions of the dorsal half of the first visceral arch; (8) the bonesforming the right and left Mandibulpe (or the lower jaw)—namely,the Dentals, Splenials, Supra-angulars, Angulars and Articulars—allthese last being modifications of the ventral half of the same (first)visceral arch; (9) the ossicles of the eai, columella anris (p. 179),. ; : Br. I 11 Analytical Diagram of thr Viscrral Arches. The dotteil porlions arc not dc-velopeJ. being the remnants of the dorsal half of the second visceral arch( = the 1st branchial arch), while the remnant of its ventral halfis transformed into the os entoglossum (p. 453); (10) the rest of theHyoid apparatus formed by the third visceral ( = 2nd branchial)arch. SKULL ^n And now to proceed to a more detailed description of the Aariousregions of the Skull. The Occiput proper is formed by the Basi-occipital, right and left lateral and supra-occipital, all of whichenclose the foramen magnum, through which passes the medullaoblongata (p 51), and, as in Reptiles, the Skull articulates by a singleglobular or kidney-shaped knol) with the Atlas (r/. Skeleton,p. 848), the condyle being formed almost wholly by the basi-occipital, the lateral occipitals taking but little share in it, and thusconstituting a fundamental distinction between the Amphibians onthe one hand and Mammals on the oth
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1896
