PLATE XV. 
Figs. 1, 2. PLUTONASTER MARGINATUS, 0. sp. 
. 1. A portion of the abactinal surface; magnified 30 diameters. 
g. 2, Adambulacral and infero-marginal plates ; magnified 9 diameters. 
[For macroscopic figures of this species see P]. XIV. figs. 1, 2. | 
Figs. 3, 4. PLUTONASTER RIGIDUS, 0. sp. 
. 3. A portion of the abactinal surface; magnified 18 diameters. 
. 4, Adambulacral and infero-marginal plates; magnified 8 diameters. 
| For macroscopic figures of this species see Pl. XIV. figs. 3, 4.] 
Figs. 5, 6. PLUTONASTER NOTATUS, 0. Sp. 
g. 5. A portion of the abactinal surface ; magnified 25 diameters. 
. 6. Adambulacral and infero-marginal plates ; magnified 16 diameters. 
[For macroscopic figures of this species see PI. XIV. figs. 6, 7.] 
Figs. 7-11. PHOXASTER PUMILUS, N. sp. 
. 7. A portion of the abactinal surface of a young example; magnified 30 
diameters. 
8. Adambulacral and infero-marginal plates of a young example; magnified 
25 diameters. 
. 9. A portion of the abactinal surface of an adult example; magnified 25 
diameters, 
. 10. Adambulacral and infero-marginal plates of an adult example ; magni- 
fied 20 diameters. 
g. 11. Mouth-plates and armature ; magnified 12 diameters. 
[For macroscopic figures of this species see Pl. XL. figs. 3-6. | 
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