PLATE XIII. 



Page 

 FigS. 1, 2. PONTASTER PLANETA, D. sp 30 



Fig. 1. Adambulacral aud infero-marginal plates; magnified 15 diameters. 

 Fig. 2. A portion of the abactinal surface ; magnified 40 diameters. 



[For macroscopic figures of this species see PL X. figs. 1, 2.] 



Figs. 3, 4. Dytaster bisekialis, n. sp 77 



Fig. 3. Adambulacral and infero-marginal plates ; magnified 12 diameters. 

 . Fig. 4. A portion of the abactinal surface ; magnified 30 diameters. 



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



Figs. 5, 6. Dytaster inermis, n. sp 79 



Fig. 5. Adambulacral and infero-marginal plates ; magnified 30 diameters. 

 Fig. 6. A portion of the abactinal surface ; magnified 50 diameters. 



[For macroscopic figures of this species see PI. X. figs. 5, 6.] 



Figs. 7, 8. PONTASTER SUBTUBERCULATUS, 11. sp. ... 58 



Fig. 7. Adambulacral and infero-marginal plates ; magnified 20 diameters. 

 Fig. 8. A portion of the abactinal surface ; magnified 35 diameters. 



[For macroscopic figures of this species see PI. V. figs. 3, 4.J 



Figs. 9, 10. Plutonaster bifrons, Wyville Thomson, sp. . . 84 



Fig. 9. Adambulacral and infero-marginal plates; magnified 10 diameters. 

 Fig. 10. A portion of the abactinal surface ; magnified 30 diameters. 



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



Figs, ii, 12. Plutonaster ambiguus, n. sp. ... 95 



Fig. 11. Adambulacral and infero-marginal plates; magnified 20 diameters. 

 Fig. 12. A portion of the abactinal surface ; magnified 35 diameters. 



[For macroscopic figures of this species see PI. XL figs. 5, 6.] 



