PLATE LXXXI. 
Page 
Figs. 1, 2. HYMENASTER PERGAMENTACEUS, 1. sp. . * ae. 499 
Fig. 1. Abactinal aspect ; natural size. 
Fig. 2. Actinal aspect; natural size. 
[For magnified details of this species see P], LXX XIII. figs. 1-3. ] 
Figs. 3, 4. HyMENASTER FORMOSUS, 2. sp. : ; oe 
Fig. 3. Abactinal aspect; magnified 3 diameters. 
Fig. 4. Actinal aspect ; magnified 3 diameters. 
[For magnified details of this species see Pl. LXXXIII. figs. 4-6. | 
