PLATE LXXXIII. 



Page 



Figs. 1-3. Hymenaster pergamentaceus, n. sp. . . . 499 



Fig. 1. A portion of the supradorsal membrane ; magnified 10 diameters. 

 Fig. 2. Mouth-plates ; magnified. 



Fig. 3. Adambulacral plates and adjacent portion of the actinal surface ; magnified 

 7 diameters. 

 [For macroscopic figures of this species see PI. LXXXI. figs. 1, 2.] 



Figs. 4-6. Hymenaster formosus, n. sp. 497 



Fig. 4. A portion of the supradorsal membrane ; magnified 16 diameters. 

 Fig. 5. Mouth-plates ; magnified. 



Fig. 6. Adambulacral plates and adjacent portion of the actinal surface ; magnified 



15 diameters. 



[For macroscopic figures of this species see PL LXXXI. figs. 3, 4.] 



Figs. 7-9. Hymenaster echinulatus, n. sp. . . 502 



Fig. 7. A portion of the supradorsal membrane ; magnified 15 diameters. 

 Fig. 8. Mouth-plates ; magnified. 



Fig. 9. Adambulacral plates and adjacent portion of the actinal surface ; magnified 



16 diameters. 



[For macroscopic figures of this species see PI. LXXXII. figs. 1, 2.] 



Figs. 10-12. Hymenaster porosissimus, n. sp. . . 515 



Fig. 10. A portion of the supradorsal membrane ; magnified 10 diameters. 

 Fig. 11. Mouth-plates; magnified. 



Fig. 12. Adambulacral plates and adjacent portion of the actinal surface ; magnified 

 8 diameters. 



[For macroscopic figures of this species see PI. LXXXII. figs. 3, 4.] 



