EXPLANATION OF PLATES. 



PL«TE lO. PAGE 



DIPHYPHYLLUM WADSWORTHI, N. Sp. 26 



FIG. 1. — Ventral view of a large corallum. 



DIPHYPHYLLUM LAXUM, N. Sp. 26 



FIG. 2. — Ventral view of a medium-sized corallum. 

 FIG . 3. — Ventral view of another small-sized co- 

 rallum. 



CYSTIPHYLLUM LAMELLATUM, N. Sp. 29 



FIG. 4. — Lateral view of a email corallum. 

 FIG. 5. — Calix view of another example. 



CYSTIPHYLLUM OSCULUM, N. Sp. 30 



FIG. 6. — Calix view of a small specimen. 



FIG. 7. — Lateral view of another example, with a 



portion of the calix broken away, to show the 



septa. 

 FIG. 8. — Lateral view of another individual. 



CYSTIPHYLLUM CONSTRICTUM, N. Sp. 30 



FIG. 9. — Lateral view of a mature specimen, with a 

 portion of the side broken away, to show the 

 vesicles on the invaginated cups. 



FIG. 10. — Calix view of another example. 



FIG. 11. — View of one-half of the calix of another specimen, 



FIG. 12. — Calix view of another individual. 



