PLATE XL,IV. 



F'gs. 1-9 Anterior ventral plates of Dinichthvs Terreeei Newb... 623 



1 and 2. The space between these was filled with a ventro-median plate. Ventral sur- 

 faces. 

 3 and 4. Posterior ventrals ( formerly called "jugulars " ). 

 5-7. Anterior and posterior ventral plates from another specimen. 

 6. Reversed view (dorsal side) of 7. 



8. Inner (dorsal) view of anterior ventral from a third individual. The four sections 



are taken at the points where the letters correspond. 



9. The same as Fig. 3 detached to show the overlapped spaces. 



All figures drawn to the same scale and locality. Cleveland shale, Vermilion River 

 and Lake Shore, Lorain Co., Ohio. 



