PLATE VII. 



PAGE. 



LiNOULA INDI4NENSI8. n. Sp 69 



Fie. 1. Ventral valve. 



DiSOINA ILLIN0I8ENSI8. D. bp 70 



Fig. 2. Dorsal view. 



Fig. 3. Interior of ventral valve. 



Fie. 4. Dorsal valve of another specimen. 



Fie. 5. Interior of a dorsal valve of another specimen. x 



DiBCINA MUNDA, n. sp 



Fig. C. Dorsal view. 



Fig. 7. Lateral view of the same valve. 



Eatonia coulteki. n. sp "ri 



Fig. 8. Ventral view. 

 Fig. !). Dorsal view. 

 Fig. 10. Cardinal view. 

 Fig. 11. Front view. 



MiCHILINIA BRANNEBI. H. SP Sg 



Fig. 12. Bide view. 

 Fig. 13, Summit view. 



CONULAKIA BLAIEI, n. sp 73 



Fig. 14. Portion of surface of upper part of shell. 



Fie. 15. A spoeimcn showing a portion of the inside of a shell. 



Blaibocbinus spinosulus. n. sp 28 



Fig. 16. Azygous view. 



Fig. 17. Opposite view of same specimen. 



Fig. 18. Summit view. 



Campopuvllum kansasensis, n. sp 67 



Fie's. 19 and 20. Calyces. 



Fig's. 21 and 22. Lateral views of same specimens. 



