PLATE XXVIII. 



Page 

 Figs. 1-4. Styracaster armatus, n. sp. . . .153 



Fig. 1. A portion of the abactinal surface; magnified 18 diameters. 



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



Fig. 3. Adambulacral plates ; magnified 9 diameters. 



Fig. 4. A cribriform organ ; magnified 6 diameters. 



[For macroscopic figures of this species see PI. XXIV. figs. 1-4.] 



Figs. 5-8. Hyphalaster inermis, n. sp. . . . 162 



Fig. 5. A portion of the abactinal surface ; magnified 20 diameters. 

 Fig. 6. Mouth-plates ; magnified 9 diameters. 

 Fig. 7. Adambulacral plates ; magnified 12 diameters. 

 Fig. 8. A cribriform organ ; magnified 9 diameters. 



[For macroscopic figures of this species see PL XXV. figs. 4-6.] 



Figs. 9-12. Hyphalaster planus, n. sp 165 



Fig. 9. A portion of the abactinal surface ; magnified 18 diameters. 



Fig. 1 0. Mouth-plates ; magnified 5 diameters. 



Fig. 11. Adambulacral plates ; magnified 8 diameters. 



Fig. 12. A cribriform organ ; magnified 6 diameters. 



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



Figs. 13-16. Hyphalaster hyalinus, n. sp. . . 156 



Fig. 13. A portion of the abactinal surface ; magnified 15 diameters. 

 Fig. 14. Mouth-plates; magnified 9 diameters. 

 Fig. 15. Adambulacral plates; magnified 12 diameters. 

 Fig. 16. A cribriform organ; magnified 15 diameters. 



[For macroscopic figures of this species see PI. XXVI. figs. 1-5.] 



Figs. 17-20. Hyphalaster diadematus, n. sp. . . .159 

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

 Fig. 18. Mouth-plates; magnified 10 diameters. 

 Fig. 19. Adambulacral plates ; magnified 15 diameters. 

 Fig. 20. A cribriform organ; magnified 12 diameters. 



[For macroscopic figures of this species see PI. XXI. figs. 1-4.] 



