PLATE XXV. 



LEPETOPSIS CHESTERENSIS Worthen 

 Fig. 1. Vertical view, natural size, 

 Fig. 1 a. Lateral view of same. 



STBAPAROLLUS VABSOVIENSIS Worthen . 

 Fig. 2. Dorsal view natural size. 

 Fig. 2 a. Profile view of same. 



PLEUBOTOMARIA NAUVOOENSIS Worthen 

 Fig. 3. Limestone cast natural size, 



NATICOPSIS MADISONENSIS Worthen 

 Fig. 4. Profile view natural size. 

 Fig. 6. Opposite view of same. 



BELLEBOPHON GIGANTEUS Worthen. 

 Fig. 5. Dorsal view natural size. 

 Fig. 5 a. Lateral view of same. 



MUBCHISONIA LASALLENSIS Worthen 



lig. 7. View of spire natural size. 



Fig. 7 a. Outline view of same enlarged 2X. 



