EXPLANATION OF PLATE XIV. 



Figs. 1-7. PRODUCTUS SEDALIENSIS n. sp p. 108 



1-2. Pedicle and lateral views of a large specimen. 3-5. Pedicle, 

 lateral and posterior views of another smaller specimen. 

 6-7. Pedicle and lateral views of a natural mould of the 

 exterior of a brachial valve. (W. M., No. 9691.) 

 Chouteau limestone, Pettis County, Missouri. 



Figs. 8-13. PRODUCTUS CURTIROSTRIS Winchell p. 130 



8-9. Lateral and pedicle views of a pedicle valve. 10-11. Poste- 

 rior and pedicle views of another pedicle valve. Cotypes. 

 (U. M., No. 1337.) 



Chonopcctus sandstone, Burlington, Iowa. 



12-13. Views of two pedicle valves. In fig. 13 the material has 

 been broken away in such a manner as to exhibit the impres- 

 sion of the brachial valve. (W. M., No. 10576.) 



English River grit, Maple Mill, Washington County, Iowa. 



Figs. 14-21. PRODUCTUS BLAIRI Miller p. 110 



14-16. Pedicle, brachial and lateral views of a nearly complete 

 specimen. 17-19. Similar views of another example. (W. M., 

 No. 9824.) 



Chouteau limestone, Chouteau Springs, Missouri. 

 20-21. Pedicle views of the natural moulds of two brachial 

 valves. (W. M., No. 9692.) 



Chouteau limestone, Pettis County, Missouri. 



Figs. 22-23. PRODUCTUS sp. 



Pedicle and brachial views of a nearly complete shell. (W. M., 

 No. 9825.) 



Chouteau limestone, Chouteau Springs, Missouri. 



Figs. 24-25. PRODUCTUS PARVULUS Winchell p. 12S 



Views of two pedicle valves. Cotypes. (U. M., No. 1338.) 

 Kinderhook, bed No. 5, Burlington, Iowa. 



Figs. 26-27. PRODUCTUS sp. 



Pedicle and lateral views of a nearly complete pedicle valve. 

 (D. K. G., No. 2101.) 



Burlington limestone, Louisiana, Missouri. 



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