PLATE IX 



THE STRUCTURE OF THE SPINAL PLATES 



Fig. 23. External aspect of the left plate of Dinichthys intermedius Nwb. 

 Fig. 24. The right plate seen from the outside. 

 Fig. 25. The left plate from the inside. 



Buffalo Museum, No. 15261/E2816. 

 Fig. 26. Outside view of the right plate of Dinichthys curtus Nwb. 



American Museum of Natural History, No. 8795. 



All figures natural size. 



