PLATE XX. 



Figure 1. Trochocyathus nummiformiSj Duncan. The corallum from abovej natural size. 



2. Septa and pali^ magnified. 



3. The base, natural size. 



4. The central part of the base, magnified. 



5. The pali of variety 1. 



6. The columella of variety 2. 



7. EcHiNOPOBA MAXIMA, Duncau. Natural size of part of corallum. 



8. Agakicia DANiE, Duncan. Calices, magnified. 



9. The back and base of the corallum, natural size. 



10. Latim^andra insignis, Duncan. Half of the corallum, natural size. 



