PLATE XVIII. 



Page 

 Figs. 1-4. Craspidaster hesperus, Mudler and Troschel, sp. . . 177 



Fiff. 1. A portion of the abactinal surface of an example from the Philippine 

 Islauds ; magnified 20 diameters. 



Fig. 2. Adambulacral and infero-marginal plates of the same ; magnified 1 5 dia- 

 meters. 



Fig. 3. A portion of the abactinal surface of an example from Hong Kong ; magni- 

 fied 18 diameters. 



Fig. 4. Adambulacral and infero-marginal plates of the same ; magnified 12 dia- 

 meters. 

 [For macroscopic figures of this species see PI. XVII. figs. 5-7.] 



Figs. 5, 6. Pentagonaster arcuatus, n. sp. . . . 277 

 Fig. 5. A portion of the abactinal surface ; magnified 8 diameters. 

 Fig. 6. Adambulacral and adjacent intermediate plates; magnified 12 diameters. 

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



Figs. 7, 8. Aphroditaster gracilis, n. sp. . . .117 



Fig. 7. A portion of the abactinal surface, showing the plates of the median radial 

 line; magnified 12 diameters. 



Fig. 8. Adambulacral and infero-marginal plates ; magnified 12 diameters. 



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



Figs. 9, 10. PSEDDARCHASTER TESSELLATUS, n. sp. . . . 112 



Fig. 9. A portion of the abactinal surface; magnified 12 diameters. 

 Fig. 10. Adambulacral and infero-marginal plates; magnified 12 diameters. 

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



