EXPLANATION OF PLATE XVIL 



Skull of Rhamphichthys rostratus (Linnaeus). 



Fig. 1, dorsal view; Fig. 2, lateral view, art., articulare; exo., exoccipital; /)■., frontal; hy. m., hyo- 

 mandibular; in. op., interoperculum; man., malidible; mesth., mesethmoid; mptg., metapterygoid; mx., maxil- 

 lary; na-s., nasal; op., operculum; par., parietal; p. mx., premaxillary; pr. op., preoperculum; pter., pterotic; 

 ptg., pterygoid; qu., quadrate; s. occ, supraoccipital; s. op., suboperculum; sph., sphenotic; su. scap., supra- 

 scapular; sym., symplectic. 



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