PLATE XXVII. 



Page 

 FigS. 1-4. PORCELLANASTER CRASSUS, 11. sp. . . . 141 



Fig. 1 . A portion of the abactinal surface ; magnified 20 diameters. 



Fig. 2. Mouth-plates ; magnified 5 diameters. 



Fig. 3. Adambulacral plates, with segmental pits and papillae ; magnified 10 



diameters. 

 Fio\ 4. A cribriform organ ; magnified 6 diameters. 



[For macroscopic figures of this species see PI. XXII. figs. 4-7.] 



Figs. 5-8. PORCELLAN ASTER GRACILIS, n. sp. . .143 



Fig. 5. A portion of the abactinal surface ; magnified 15 diameters. 



Fig. 6. Mouth -plates ; magnified 10 diameters. 



Fig. 7. Adambulacral plates, with segmental pits and papillae; magnified 18 



diameters. 

 Fiff. 8. A cribriform orrrau ; magnified 15 diameters. 



[For macroscopic figures of this species see PI. XXII. figs. 1-3.] 



FigS. 9-12. PORCELLAN ASTER CAULIFER, 11. Sp. . . . 138 



Fig. 9. A portion of the abactinal surface ; magnified 20 diameters. 



Fig. 10. Mouth-plates; magnified 10 diameters. 



Fig. 11. Adambulacral plates ; magnified 15 diameters. 



Fio-. 12. A cribriform ortran ; magnified 12 diameters. 



[For macroscopic figures of this species see PL XXI. figs. 5-10.] 



Figs. 13-16. PORCELLANASTER TUBEROSUS, n. sp. . . . 140 



Fig. 13. A portion of the abactinal surface ; magnified 20 diameters. 



Fig. 14. Mouth-plates ; magnified 8 diameters. 



Fig. 15. Adambulacral plates; magnified 16 diameters. 



Fig. 16. A cribriform organ ; magnified 9 diameters. 



[For macroscopic figures of this species see PL XXIII. figs. 1-4.] 



Figs. 17-20. Styracaster horridus, n. sp. . . . 150 



Fig. 17. A portion of the abactinal surface ; magnified 20 diameters. 



Fig. 18. Mouth-plates; magnified 4 diameters. 



Fig. 19. Adambulacral plates ; magnified 8 diameters. 



Fig. 20. A cribriform organ ; magnified 5 diameters. 



[For macroscopic figures of this species see PL XXIII. figs. 5-7.] 



