PLATE XXVII. 
Figs. 1-10. PENTACRINUS ALTERNICIRRUS, 0. sp. 
Fig. 1. Portion of stem containing two nodal joints; interradial 
view, 
Fig. 2. Lower or syzygial face of a nodal jomt which bears three 
clrri, 
Fig. 3. The corresponding face of a jot bearing only two cirri, 
Fie. 4. The ambulacral skeleton of a pinnule ; from above, 
Fig. 5. The end of a pinnule ; from the side, . 
Fig. 6. The arm-groove and brachial ambulacrum, 
Figs. 7, 8. Inner and outer sides of an arm, bearing a pinnule-cyst of 
Myzostoma deformator, von Graft, 
Figs. 9,10. Inner and outer sides of an arm, modified by a cyst of 
Myzostoma pentacrin, von Graft, 
Figs. 11-13. PENTACRINUS NARESIANUS, 0. sp. 
Fig. 11. The ambulacral skeleton of a pinnule ; from the side. Some 
of the covering plates have been removed, 
Fig. 12. The same; from above, 
Hig, 13.) the brachial ambulacrum ; from above, 
Diam. 
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