EXPLANATION OF PLATES. 



PLATE 3>. 



ERIDOPHYLLUM LOUISVILLBNSIS, N, Sp. 



FIG. 1— Ventral view. 



DIPHYPHYLLUM BILLINGSI, N. Sp, 



FIG. 2 — Ventral view of the corallum. 

 FIG. 3 — Lateral view of the same specimen. 



BORDENIA KNAPPI, 



FIGS. 4-8 — Ventral views exhibiting calicular budding. 

 FIGS. 5-7-10 — Ventral views of three composite examples. 

 FIGS. 6-9 — Lateral views of two ordinary sized corallums. 

 FIGS. 11 — Ventral view of a broadly expanded cup. 



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