PLATE LXXX. 



• Page 



Figs. 1-5. Hymenaster pellucidus, Wyville Thomson, . . 508 



Fig. 1. Abactinal aspect ; magnified 3 diameters. 



Fig. 2. Actinal aspect ; magnified 3 diameters. 



Fig. 3. A portion of the supradorsal membrane ; magnified 20 diameters. 



Fig. 4. Adambulacral plates and adjacent portion of the actinal surface ; magni- 

 fied 18 diameters. 



Fig. 5. Mouth-plates ; magnified. 



Figs. 6-9. Korethraster hispidcts, Wyville Thomson, . . 464 



Fig. 6. Abactinal aspect ; magnified 4 diameters. 



Fig. 7. Actinal aspect ; magnified 4 diameters. 



Fig. 8. A portion of the abactinal surface ; magnified 24 diameters. 



Fig. 9. Adambulacral plates and adjacent portion of the actinal surface ; magni- 

 fied 35 diameters. 



