PLATE 14 



Stropheodonta demissa (Conrad) 

 Page 77. 



Figs. 1 and 3. Pedicle and back views of an average specimen. 



(Callaway limestone of Callaway County.) 

 Figs. 2 and 4. Immature specimens, pedicle views. 



(Snyder Creek shale of Callaway County.) 

 Fig. 5. Interior mould of brachial valve of an immature specimen. 



(Snyder Creek shale of Callaway County.) 

 Fig. 6. A small specimen from the Mineola limestone. 

 Fig. 7. A specimen of average size with coarse plications. 



(.Snyder Creek shale of Callaway County.) 

 Fig. 8. A large specimen with fine plications. 



(Snyder Creek shale of Callaway County.) 



Stropheodonta inequiradiata Hall 

 Page 80. 



Figs. 10 and 11. Side and pedicle views of an imperfect specimen. 

 (Mineola of Montgomery County.) 



Stropheodonta boonensis Swallow 

 Page 75. 



Fig. 9. An unusually convex specimen. 



(Snyder Creek shale of Callaway County.) 



Stropheodonta navalis Swallow 

 Page 82. 



Fig. 12. Side view of an average specimen. 



(Snyder Creek shale of Callaway County ) 



