EXPLANATION OF PLATE XVIIL 



Skull of Eigenmannia virbscens (Valenciennes). 



Fig. 1, dorsal view; Fig. 2, lateral view, par., parietal; pter., pterotic; Jr., frontal; nas., nasal; pmx., 

 premaxillary; exo., exoccipital; spc, sphenotic; 6. occ, basioccipital; 1st. s. o., first suborbital; 2d s. o., second 

 suborbital; Srd s. o., third suborbital; max., maxillary; man., mandible; pr. op., preoperculum; in. op., 

 interoperculum; s. op., suboperculum; op., operculum; m. pt., metapterygoid; hy. m., hyomandibular. 



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