PLATE VII 



THE INFERO-GNATHAL AND THE POSTERO-INFERO-GNATHAL PLATES 

 OF DIHICHTHTS INTERMEDIUS Nwb. 

 From a specimen in the American Museum of Natural History. 

 Fig. 18. The left plate from the outside. 

 Fig. 19. The right plate from the inside. 



Compare with Text'figures 30 and 31. 



