bo 
o 
g. 10. A portion of the abactinal surface ; macnified 30 diameters. 
PLATE XIII. 
Figs. 1, 2. PONTASTER PLANETA, 0. Sp. 
Adambulacral and infero-marginal plates ; magnified 15 diameters. 
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 BISERIALIS, Nn. sp. 
. Adambulacral and infero-marginal plates ; magnified 12 diameters. 
. A portion of the abactinal surface ; magnified 30 diameters. 
[For macroscopic figures of this species see Pl. X. figs. 3, 4.] 
~ 
Figs. 5, 6. DYTASTER INERMIS, I. Sp. . : 
Adambulacral and infero-marginal plates ; 
2 
magnified 30 diameters. 
A portion of the abactinal surface ; magnified 50 diameters. 
| For macroscopic figures of this species see Pl. X. figs. 5, 6. | 
Figs. 7, 8. PoNTASTER SUBTUBERCULATUS, 0. Sp. 
Adambulacral and infero-marginal plates; magnified 20 diameters. 
A portion of the abactinal surface ; magnified 35 diameters. 
[For macroscopic figures of this species see Pl. V. figs. 3, 4. | 
Figs. 9, 10. PLUTONASTER BIFRONS, Wyville Thomson, sp. 
Adambulacral and infero-marginal plates ; magnified 10 diameters. 
[For macroscopic figures of this species see Pl. XI. figs. 1-4.] 
Figs. 11, 12. PLUTONASTER AMBIGUUS, 0. Sp. : 
g. 11, Adambulacral and infero-marginal plates ; magnified 20 diameters. 
g. 12. A portion of the abactinal surface ; magnified 35 diameters. 
[For macroscopic figures of this species see P]. XI. figs. 5, 6.] 
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