EXPLANATION OF PLATES. 



PLATE 4. PAGE 



ZAPHRENTIS ISCHYPUS, N. Sp. 8 



FIG. 1 — Lateral view of a large example. 



FIG. 2 — View of the calix of another individual. 



FIG . 3 — Longitudinal section of another specimen showing the tabulas. 



ZAPHRENTIS COMIS, N. Sp. 



FIG. 4 — Posterior view showing the calix. 



FIG. 5 — Longitudinal section of another example showing the tabuhie 



and calix. 

 FIG. 6 — Calix view of another individual. 



ZAPHRENTIS AMPLIATUS, N. Sp. 



FIG. 7 — Lateral view. 



FIG. 8 — Calix view of another example. 



HELIOPHYLLUM BORDENI, N, Sp. 13 



FIG. 9 — Lateral view. 



FIG. 10 — Calix view of another example. 



BLOTHROPHYLLUM CINGULATUM, N. Sp, 10 



FIG. 11 — Lateral view. 



FIG. 12 — ^Lateral view of another example. 



FIG. 13 — Calix view of another individual. 



CYATHAXONIA COMPRESSA, N. Sp. 



FIG. 14 — Lateral view. 



F IG". 15 — Lateral view of another example. 

 FIG. 16 — Calix view of another specimen. 

 FIG. 17 — Calix view of another individual. 



