40 ILLINOIS BIOLOGICAL MONOGRAPHS ' [210 



EXPLANATION OF PLATE 



HEXAGRAMMOS DECAGRAMMUS 



Fig. II. Posterior view of skull. One and one-half times natural size. 

 Fig. 12. Lateral view of skull. One and one-half times natural size. 

 Fig. 13. Dorsal view of skull. One and one-half times natural size. 



