PLATE XXIV. 



Page. 

 Figs. 1— i. Prolecanites cu-rleyi Smith, sp. nov 53 



Lower Carboniferous, Kinderhoolc stage. Cedar (iaji, Wright Count}', Mo. 



Figs. 1-3. Side, front, and rear \iew, enlarged twice. 



Fig. 4. Septa from tlie same specimen, enlarged 4 times. 

 Figs. 5-7. Aganides discoidai.is Smith, sp. nov 114 



Lower Carboniferous, Kimlerhook stage. Cliouteau limestone, Pettis County, Mo. 



Figs. 5 and 6. Side and front \iews. 



Fig. 7. Septa of same specimen, enlarged twice. 

 Figs. 8-12. Muexstekoceras os.\gexse Swallow 119 



Lower Carboniferous, Kinderhook stage, Chouteau limestone, Pettis County, Mo. 



Figs. 8-10. Both sides and front, enlarged twice. 



Figs. 11 and 12. Side view of same specimen, with jiart of the outer whorl removed, to 

 show the septa (fig. 12), enlarged twice, septa enlarged 4 times. 

 Figs. 13-20. Gastriocekas weller! Smith, sp. nov 98 



Middle Goal Measures, Des :Moines formation, Carroll County, Mo. 



Figs. 13-15. Side, front, and rear views of the type specimen, enlarged twice. 



Figs. 16-18. Side, front, and rear views of another specimen, showing the septa, enlarged 

 twice. 



Figs. 19 and 20. Side and fn)nt views of a smaller specimen, enlarged twice, to show 

 the surface ornamentation. 



196 



