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ILLINOIS BIOLOGICAL MONOGRAPHS 



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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. 



orbital foramen 



orbitosphenoid 



preopercular 



prootic 



parasphenoid 



quadrate 



ramus oticus facialis foramen 



septum semicircularis anterius 



supraethmoid 



septum semicircularis laterale 



supra occipital 



septum semicircularis posterius 



sphenotic 



supraorbital canal 



squamos opterotic 



squamoso-pterotic 



vomer 



optic foramen 

 foramen trigemino-facialis 

 glossopharyngeal foramen 

 vagus foramen 



