. Outlines of zoology. te. Of the membranebones on the side of theskull, the lachrymal infront of the orbit, andthe squamosal betweenthe quadrate and theparietal, are the mostimportant. On the roof of themouth, the basisphenoid,which lies just in frontof the basioccipital, iscovered over by a mem-brane bone — the basi-temporal. In front ofthis is a sharp basi-sphenoid rostrum orparasphenoid, also amembrane bone. Artic-ulating with the quadrateand with the rostrumare the pterygoids; infront of these lie thepalatines. The vomeris vestigial. The bonyfront of the palate isformed from inward ex-ten
. Outlines of zoology. te. Of the membranebones on the side of theskull, the lachrymal infront of the orbit, andthe squamosal betweenthe quadrate and theparietal, are the mostimportant. On the roof of themouth, the basisphenoid,which lies just in frontof the basioccipital, iscovered over by a mem-brane bone — the basi-temporal. In front ofthis is a sharp basi-sphenoid rostrum orparasphenoid, also amembrane bone. Artic-ulating with the quadrateand with the rostrumare the pterygoids; infront of these lie thepalatines. The vomeris vestigial. The bonyfront of the palate isformed from inward ex-tensions of the pre-maxillae and interorbital septumis formed chiefly from p^^_ jg^^under surface of gullsthe mesethmoid, but also skull.—From Royal Scottish Museum,from the presphenoid. the tympanum tothe inner ear extends therod-like columella. Thelower jaw originally of four membrane bones—dentary, splenial, angular, andsurangular; and one cartilage bone—the articular. The. , Condyle; ^ basitemporal; ,^ basi-sphenoidal rostrum; pt.^ pterygoid; pa.^palatine; zi., vomer ; p,mx., premaxilla; ; /., jugal; q,j,^ quadrato-jugal; q.^quadrate. 662 BIRDS. hyoid consists of a flat body, with anterior and posteriorhorns, the latter derived from the first branchial arch. The pectoral girdle consists of sabre-like scapula; extend-?m<y dorsally over the ribs, of stout coracoids sloping ventrally
Size: 1056px × 2368px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidcu3192, booksubjectzoology
