SKULL — TELEOSTS 



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Esox. It often extends dorsally to the bones of the roof. It usually 

 is toothed, the teeth arising independently of the bone. 



The bones of the lower jaw may include, in ontogeny, articulare, 

 goniale, angulare, coronoid, sesamoid articular and dentale, with 



Fig. 118. — Skull of Anarrichthys (Adams, '09). a, angulare; ar, articulare; as, 

 alisphenoid; d. dentale; fr, frontal; hm, hyomandibula; me, mesethmoid; ms, entoptery- 

 goid; ml, metapterygoid; mx, maxilla; 00, opisthotic; p, parietal; pi, palatine; pm, 

 premaxilla; prf, prefrontal or lacrimal; pro, preoperculum; ps, parasphenoid; pt, ecto- 

 pterygoid; 5, quadrate; sp, sphenotic; sqpt, squamoso-pterotic; sy, symplectic. 



Fig. 119. — Skulls of (A) Dicotylichthys punctulatus and {B) Trigla gurnardus 

 (Goodrich, '09). a, angulare; cl, cleithrum; co, coracoid; d, dentale; /, frontal; hm, 

 hyomandibula; io, interoperculum; m, maxilla; m/;, mesopterygoid; 7W/, metapterygoid; 

 n, nasal; o, operculare; pf, prefrontal; pm, premaxilla; po, preoperculum; pt, pterygoid; 

 ptf, postfrontal; pto, pterotic; q, quadrate; r, articulare; rd, radialia of fin; 5, scapula; 

 sbo, subocular, enlarged; so, suboperculum ; sy, symplectic. 



rarely a splenial. These mostly fuse, the extreme of this being in 

 Plectognaths where there are but two bones in either half of the jaw. 



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