EXPLANATION OF PLATE XVI. 



Skull of Gtmnotus carapo Linnaeus. 



Fig. 1, dorsal view; Fig. 2, lateral view, ang., angulare; art., articulare; b. occ, basi-occipital; den., 

 dentary; ex. o., exoccipital; fr., frontal; h. inn., hyomandibular; m. op., interoperculum; vislh., mesethmoid; 

 mx., maxillary; iias., nasal; op., operculum; or. sph., orbitosphenoid ; par., parietal; p. mx., premaxillary ; 

 pr. op., preoperculum; p. sph., parasphenoid; pier., pterotic; pig., pterygoid; qu., quadrate; s. occ, supra- 

 occipital; s. op., suboperculum; sph., sphenotic; su. scap., suprascapular; syjn., symplectic. 



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