114 



ILUNOIS BIOLOGICAL MONOGRAPHS 



U14 



EXPLANATION OF PLATE 

 Fig. 8. — Transverse section through middle of otic capsule and parachordal plate of 32 mm. 



Amiurus. 

 Fig. 9. — Posterior view of adult cranium of Amiurus. 

 Fig. 10. — Dorsal view of adult cranium of Amiurus. 

 Fig. IL — Dorsal view of adult cranium and jaws, showing diagrammatically the course of 



lateral line canal, position of pores and sense organs with regard to the bones. 

 Fig. 12. — Transverse section through the posterior part of the occipital arch of 8 mm. 



Amiurus. 

 Fig. 13. — ^Transverse section through the scaphia of an 8 mm. Amiurus. 

 Fig. 14. — ^Transverse section through posterior orbital region, 8 mm. Amiurus. 



i^ 



