EXPLANATION OF PLATES. 



PLflTB 22. PAGE 



HELIOPHYLLUM AMPLIATUM, N. Sp. 62 



FIG. 1. — Lateral view of a matured example. 

 FIG. 2. — Calix view of another individual. 



HELIOPHYLLUM CONIGERUM, N. Sp. 62 



FIG. 3. — Lateral view of a well preserved example. 

 FIG. 4. — Calix view of another specimen. 



CYSTIPHYLLUM MULTICRENATUM, N. Sp. 63 



FIG. 5. — Calix view showing the vesiculose structure 

 in the bottom of the cup, and the invagin- 

 ated appearance. 



FIG. 6. — Oblique posterior view of another specimen, 

 showing the well developed lamel]a3, and 

 exhibiting a bud in the bottom of the cup. 



FIG. 7. — Lateral view of a decorticated specimen, 

 exhibiting the fine vesiculose structure. 



ZAPHRENTIS OBSCURUS. N. Sp. 63 



FIG. 8. — Posterior view of a small example. 



FIG. 9. — Lateral view of another specimen with a 

 portion of the cup broken away to exhibit 

 the bottom of the calix and the lamellaB. 



FIG. 10. — Oblique posterior view of another individ- 

 ual exhibiting the lamellae. 



