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ILUNOIS BIOLOGICAL MONOGRAPHS 



[112 



EXPLANATION OF PLATE 

 Fig. 5. — Model of mandibular and suspensorial apparatus of 32 mm. Amiurus, lateral view; 



cartilage stippled. 

 Fig. 6. — Cranium of adult Amiurus, ventral view. 

 Fig. 7. — Same, median section and internal surface, cartilage stippled. 



or f orbital foramen 



OS orbitosphenoid 



pre preopercular 



pro prootic 



ps parasphenoid 



q quadrate 



r ol VII ramus oticus facialis foramen 



sa septum semicircularis anterius 



se supraethmoid 



si septum semicircularis laterale 



so supra occipital 



sp septum semicircularis posterius 



sph sphenotic 



sps supraorbital canal » 



sq pi squamos opterotic 



sq plr squamoso-pterotic 



to vomer 



// . optic foramen 



V-VII foramen trigemino-facialis 



IK glossopharyngeal foramen 



X vagus foramen 



