PLATE XXI. 
Page 
Figs. 1-4. HypHALASTER DIADEMATUS, 0. Sp... : : 159 
Fig. 1. Abactinal aspect ; magnified 4 diameters. 
Fig. 2. Actinal aspect ; magnified 4 damotere! 
Fig. 3. Profile view ; magnified 4 diameters. 
Fig. 4. A portion of the abactinal surface ; magnified about 14 diameters. 
[For magnified details of this species see Pl. XXVIII. figs. 17-20. ] 
Figs. 5-10. PoRCELLANASTER CAULIFER, n. sp. . 5 : 138 
Fig. 5. Abactinal aspect ; magnified 4 diameters. 
Fig. 6. Actinal aspect ; magnified 4 diameters. 
Fig. 7. Profile view; magnified 4 diameters. 
Fig. 8. Diagram of the terminal plate ; magnified. 
Fig. 9. Diagram of the marginal plates ; magnified. 
Fig. 10. The madreporiform body ; magnified 8 diameters. 
[For magnified details of this species see Pl. XXVII. figs. 9-12. | 
