EXPLANATION OF PLATES. 



PLATE, 18. PAGE 



ZAPHRENTIS INSOLENS, N. Sp. 44 



FIG. 1. — Posterior view showing the oblique tabulse 



and the fossette. 

 FIG. 2. — Longitudinal section showing the oblique 



tabulse and the lamellae. 



CHONOPHYLLUM TYPICUM, N. Sp. 48 



FTGS. 3-4. — Views of the calix of two different indi- 

 viduals. 

 FIG. 5. — Lateral view of another example. 



CHONOPHYLLUM INFUNDIBULUM, N. Sp. 49 



FIG. 6. — Lateral view of a matured example. 



FIG. 7. — Calix view of another individual. 



FIG. 8. — Posterior view of a specimen and exhibiting 



the calix. 

 FIG. 9. — Lateral views of two specimens attached by 



their epithecal walls. 

 FIG. 10. — Calix views of two more examples attached 

 by their epithecal walls. 



