PLATE LXXXVII. 
\ Page 
Figs. 1-3. HyMENASTER NoBILIs, Wyville Thomson, ~ : 495 lee 
Fig. 1. Abactinal aspect ; natural size. | 
Fig. 2. Actinal aspect ; natural size. 44 
9 . Fig. 3. Adambulacral plates and adjacent portion of the actinal “anaes: magnified a 
5 3 diameters. 
3 | Figs. 4-7. HyMENASTER INFERNALIS, Tepe | 1) We cani aaa Oe 
Me ut Fig. 4. Abactinal aspect ; natural size. | 
a | Fig. 5. A portion of the supradorsal membrane ; magnified 15 diameters. 
x Fig. 6. Mouth-plates ; magnified. 
» . . Fig. 7. Adambulacral plates and rativecns portion of the actinal surface; magnified 
; a 10 diameters. 
