PLATE XXVI. 
Page 
Figs. 1-6. HyPHALASTER HYALINUS, 0. Sp. : H : 156 
. Abactinal aspect ; magnified 3 diameters. 
. Actinal aspect ; magnified 3 diameters. 
. Profile view; magnified 3 diameters. 
. Abactinal aspect of a young example ; magnified 4 diameters. 
. Actinal aspect of a young example ; magnified 4 diameters. 
j. An embryonic abactinal plate ; magnified 54 diameters. 
[For magnified details of this species see P]. XXVIII. figs. 13-16. | 
