PLATE VI. 
HYOcRINUS BETHELLIANUS, Wyv. Thoms. 
. Radial view of the calyx and arms, 
. Interradial view of the entire specimen, 
. The calyx and arm-bases ; anal side, 
. The disk, from above, . i 
. Inner view of a fragment of the upper portion of the disk, 
. Terminal joints of a pinnule, mounted in dammar, 
Diam. 
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