PLATE XVIII. 
Figs. 1-4, CRASPIDASTER HESPERUS, Miiller and Troschel, sp. 
. A portion of the abactinal surface of an example from the Philippine 
Islands ; magnified 20 diameters. 
. Adambulacral and infero-marginal plates of the same; magnified 15 dia- 
meters. 
. A portion of the abactinal surface of an example from Hong Kong; magni- 
fied 18 diameters. 
. Adambulacral and infero-marginal plates of the same; magnified 12 dia- 
meters. 
[For macroscopic figures of this species see Pl. XVII. figs. 5-7. ] 
Figs. 5, 6. PENTAGONASTER ARCUATUS, 0. sp. . - . 
. A portion of the abactinal surface ; magnified 8 diameters. 
. Adambulacral and adjacent intermediate plates; magnified 12 diameters. 
[For macroscopic figures of this species see Pl. LII. figs. 1, 2. ] 
Figs. 7, 8. APHRODITASTER GRACILIS, 0. sp. : : - 
. A portion of the abactinal surface, showing the plates of the median radial 
line ; magnified 12 diameters. 
. Adambulacral and infero-marginal plates; magnified 12 diameters. 
|For macroscopic figures of this species see Pl. XVII. figs. 1, 2.] 
Figs. 9, 10. PSEUDARCHASTER TESSELLATUS, 0. Sp. 
. 9. A portion of the abactinal surface; magnified 12 diameters. 
. 10. Adambulacral and infero-marginal plates; magnified 12 diameters. 
[For macroscopic figures of this species see P]. XVII. figs. 3, 4.] 
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