EXPLANATION OF PLATES. 



PLATE. 8. PAGE 



ZAPHRENTIS OBLIQUATUS, N. Sp. 22 



FIG. 1. — Lateral view. 



FIG. 2. — Lateral view of another example. 

 FIG. 3. — Lateral view with a portion of side brok- 

 en away to show the oblique tabular. 



ZAPHRENTIS HOBBSI, N. Sp. 23 



FIG. 4. — Lateral view. 



F I G. 5. — Lateral view of another specimen. 



F I G. 6. — Lateral view of another example, with a 



portion of the calix broken away, to show. 



the lamellae, steep wall and broad tabula?. 



HELIOPHYLLUM PARTITUM, N. Sp. 18 



FIG. 7. — Ventral view of a small example. 

 FIG. 8. — Ventral view of another specimen. 



HELIOPHYLLUM BEECHERI, N. Sp. 19 



F I G. 9. — Lateral view of a large corallum. 



MICHELINIA LOUISVILLENSIS, N. Sp. 20 



F I G. 10. — Ventral view of a small example, 

 F I G. 11. — Ventral view of a large specimen. 

 F I G. 12. — Basal view of another individual. 



MICHELINIA. WILLIAMSI, N. Sp. 21 



F I G. 13,— Ventral View. 



