Kastman. — Dinichthys. 



PLATE 3. 



Fig 1 DinicMh,,s (?) intermedins Newb. X |. Cleveland Shale ; Lindale, Ohio. 

 ' M. C. Z., Cat. No. 1380. External aspect of supposed antero-ventro- 



median plate. . ./->,• 



Fi. 2 Duuchllujs lerrelU mv,h. Y. \. Cleveland Shale ; Lorain County Ohio. 

 ^ C Z. Cat. No. 1315. Posterior aspect of carinal process belong- 

 ing to a large-sized dorso-niedian, viewed in a vertical position. The 

 semicircular incision below, where it overrode the vertebral axis, us 

 massive character, and depth of posterior cavity, are remarkable. It 

 projects downward and backward at an angle of about 60 with the 

 plane of the dorso-iuedian. traced along the median hne of the back. 

 Fi. 3. DJchihys erfdiensis Kayser. X^ Middle Devonian; Berndorf, near 

 Hillesheim, Eifel District. M. C. Z., Cat. No. 13,4. Carinal process 

 detached from dorso-raedian plate. 

 Fig. 4. Dinichthys pusudosuss^..o.. X \. Hamilton Limestone ; Cement Quar- 

 ries, Milwaukee, Wisconsin. M. C Z., Cat. No. 1381. Shgh.ly 

 abraded antero-dorso-lateral plate, showing single sensory canal, and 

 relatively fine tuberculation. 



