. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. 162 MORPHOLOGY OF THE ORGANS OF VERTEBRATES. have been named; it usually enters into the composition of the anterior wall of the orbit, but it may be forced forward by the Fig. T71. Ventral and side views of the skull of [ft't-:ria 'Sth-:n:d.:n'^, after Gnnther. bo, basioccipital ; bs, basisphenoid ; no. exoccipital; fr, frontal; j, jugal; /, lachrymal; mx, maxillare; «, nasal; 00, opisthotic; .' -,. palatine; pf, prefrontal; pm, premaxillary; to. postorbital; po', postfrontal ; //, pter\"goid; q^ quadrate;

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. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. 162 MORPHOLOGY OF THE ORGANS OF VERTEBRATES. have been named; it usually enters into the composition of the anterior wall of the orbit, but it may be forced forward by the Fig. T71. Ventral and side views of the skull of [ft't-:ria 'Sth-:n:d.:n'^, after Gnnther. bo, basioccipital ; bs, basisphenoid ; no. exoccipital; fr, frontal; j, jugal; /, lachrymal; mx, maxillare; «, nasal; 00, opisthotic; .' -,. palatine; pf, prefrontal; pm, premaxillary; to. postorbital; po', postfrontal ; //, pter\"goid; q^ quadrate; qjy quadratojugal; sq, squamosal; ^, vomer. In the elasmobranchs the upper jaw is formed by the ptery- goquadrate cartilage, but in all higher forms other elements usurp these functions. In front there are a pair of premaxilla- ries already mentioned, and behind these a pair of mamillaries. 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

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