74 UNIVERSITY OF MISSOURI BULLETIN 



Fig. 21. Conchodus variablis Eastman, From a six inch bed of 

 green sandstone at the base of the Chouteau limestone, 

 Providence, Mo. Page 65-66. 



Figs. 22-24. Eoorodus typus gen. et. sp. nov. Top of the 

 Devonian at Louisiana, Mo. Page 68. 



Figs. 25 and 26. Helodus rowleyi sp. nov. Top of the De- 

 vonian at Louisiana, Mo. Page 66. 



