EXPLANATION OF PLATES. 



PLATE, 7. PAGE 



HELIOPHYLLUM OBESUM, N. Sp. 17 



FIG. 1. — Posterior view of a composite corallum. 



FIG. 2. — Posterior view of another composite ex- 

 ample. 



FIG. 3. — Posterior view of a simple individual. 



FIG. 4 — Longitudinal view, with a portion of the 

 calix broken away, showing the elevated 

 tabula), and the vesiculose structure. 



HELIOPHYLLUM SEAMANI, N. Sp. 17 



F I G. 5. — Posterior view of a composite example. 



HELIOPHYLLUM FLOS, N. Sp. 18 



FIG. 6. — Calix view of a large example. 

 FIG. 7. — Posterior view of a small speciman. 

 FIG. 8. — Lateral view of another individual. 



ZAPHRENTIS SELLERSI, N. Sp. 21 



FIG. 9. — Lateral view. 



FIG. 10. — Calix view of another example. 



MICHELINIA SPICULATA, N. Sp. 19 



FIG. 11,— Surface view. 



FIG. 12. — Basal view of another example. 



MICHELINIA PAPULOSA, N. Sp. 20 



FIG. 13.— Ventral view. 



FIG. 14, — Ventral view of another example. 



FIG. 15. — Basal view of another individual. 



MICHELINIA NEGLECTA, N. Sp. 20 



F I G. 16.— Ventral View. 



