EXPLANATION OF PLATE III. 



FigS. 1-9. SCHUCHERTELLA LENS (White) p. 55 



1-3. Brachial, pedicle and posterior views of a nearly perfect speci- 

 men. 4. Brachial view of another nearly perfect specimen. 

 (W. M., No. 6693.) 5-6. Exterior and interior views of a very 

 perfect pedicle valve. 7. Interior view of a brachial valve. 

 8. Interior view of a pedicle valve. (W. M., No. 13051.) 



Louisiana limestone, Louisiana. Missouri. 

 9. View of a large brachial valve. (W. M., No. 14258.) 

 Louisiana limestone, Calhoun County, Illinois. 



Figs. 10-11. SCHUCHERTELLA RUBRA Weller p. 56 



Brachial and pedicle views of the holotype. (W. M., No. 13911.) 

 Fern Glen formation, near Kimmswick, Missouri. 



Figs. 12-13. SCHUCHERTELLA FERNGLENENSIS n. sp p. 54 



Pedicle and brachial views of a nearly complete but somewhat dis- 

 torted specimen, the holotype. (W. M., No. 13910.) 

 Fern Glen formation, Fern Glen, Missouri. 



FigS. 14-16. SCHELLWIENELLA IN.EQUALIS (Hall) p. 61 



14. A nearly complete internal cast of a brachial valve. (\V. M., 

 No. 6662.) 15-16. Two nearly complete internal casts of pedicle 

 valves. (W. M., Nos. 14755 and 14754.) 



Kinderhook, Bed No. 5, Burlington, Iowa. 



Figs. 17-18. SCHELLWIENELLA CRENULICOSTATA n. sp p. 63 



17. View of a very perfect pedicle valve, the holotype. (W. M., 

 No. 14233.) 



Kinderhook oolite, Bed No. 6, Burlington, Iowa. 



18. View of a modified internal cast of a nearly complete pedicle 

 valve probably belonging to this species. (W. M., No. 14499.) 



Kinderhook, Bed No. 5, Burlington, Iowa. 



Figs. 19-22. SCHELLWIENELLA PLANUMBONA n. sp p. 65 



19-20. Two nearly complete but more or less exfoliated pedicle 

 valves. (W. M., No. 14756.) 21-22. Two incomplete and more 

 or less exfoliated brachial valves. (W. M., Nos. 6671 and 

 14756.) Cotypes. 



Kinderhook oolite, Bed No. 6, Burlington, Iowa. 



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