PLATE 30 



Spiroraphe arata (Hall) 

 Page 119. 



Figs. I and 2. Top and side views of an average specimen. 

 (Callaway limestone of Callaway County.) 



Orthoceras cf. atreus Hall 

 Page 124. 



Fig. 3. An imperfect specimen about 2/5 natural size. 

 (Snyder Creek shale of Callaway County.) 



Orthoceras sp. undet. 

 Page 123. 



Fig. 4. Fragment of unidentified specimen. Five more chambers were collected. 



(X2/5). (Snyder Creek shale of Callaway County.) 

 Fig. 5. Part of living chamber and four segments of another species. (X 2/5). 



(Snyder Creek shale of Callaway County.) 



Proetus crassimarginatus Hall and Clarke 

 Page 125. 



Figs. 6 and 7. Pygidia from the Mineola limestone of Montgomery County. 

 Fig. 8. Pygidium from the Snyder Creek shale of Callaway County. 



Bellerophon sp. undet. 

 Page 117. 



Fig. 9. Small specimen from the Mineola limestone of Montgomery County. 



