A treatise on zoology . otted line on the left side, an, adnasal ; rf, dentary ; eth, niesethmoid ;/, frontal; I, lachrymal or first suborbital ; na, nasal: op, opercular; p, parietal; pmse,premaxilla ; pohil and pohv, dorsal and ventral ]]Ostorbitals ; pop, preopercular ; pp, supra-temporal ; pt, post-temi)oral; s, pterotic ; .fo, suborbitals. surrounds the exit of the facial nerve, and lodges the anteriorsemicircular canal. The opisthotic (intercalare), situated behind it,may cover the outer horizontal canal; but is often small, andsometimes absent (many Teleostei). As Huxley showed [229],th
A treatise on zoology . otted line on the left side, an, adnasal ; rf, dentary ; eth, niesethmoid ;/, frontal; I, lachrymal or first suborbital ; na, nasal: op, opercular; p, parietal; pmse,premaxilla ; pohil and pohv, dorsal and ventral ]]Ostorbitals ; pop, preopercular ; pp, supra-temporal ; pt, post-temi)oral; s, pterotic ; .fo, suborbitals. surrounds the exit of the facial nerve, and lodges the anteriorsemicircular canal. The opisthotic (intercalare), situated behind it,may cover the outer horizontal canal; but is often small, andsometimes absent (many Teleostei). As Huxley showed [229],the number and disposition of these otic bones is very constantamong Teleostomes, and many if not all of them can be identifiedin the terrestrial Vertebrates. 268 TELEOSTOMI The foramen magnum is hounded by paired exoccipitals at thesides, and a median basioccipital below. In the Teleostei (, 381) a median supraoccipital appears above (p. 326). Theexoccipitals, which are pierced by the glossopharyngeal, the vagus,. Fig. 237. Anm calm, L. (After Allis, slightly alten-d.) A, left-side view of the skull. B, left-sideview of the ci-anium, from which the dermal bones liave been removed. Cartilage is , auditory capsule ; an, adnasal; or, dermarticular ; as, alisphenoid ; bo, basioccipital; bst,branchiostegal ray ; c, cartilaginous cranium ; d, dentary ; Cji, epiotie ; eth, mesethmoid ; ex,exoecipital; /, frontal; fa, foramen for facial nerve ; /, foramen for vagus ; ^i, hyomandibular ;top, interopercular; /, lachrymal; , median gular; , lateral line in mandible; mx,maxilla ; n, neural arch ; no, nasal; , neural spine ; o, opisthotic ; olis, orbitosphenoid ;oca, foramen for spino-occipital nerve ; , vacuity with optic foramen in front; o?/, olfactorycapsule ; op, opercular ; p, parietal; j)/, prefrontal; pni-r, preniaxilla ; po, prootic ; pob, post-orbital; pop, preopercular; pp, suprateniporal; pt, post - temporal; ptf, postfrontal; q,quadrate; s, ptero
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
