PLATE XV. 



Pentacrinus mulleri, Oersted. 



Fig. 1. The calyx and arm-bases, 



Fig. 2. Another specimen with four radials, 



Fig. 3. An arm of this specimen (Martinique), 



Fig. 4. Portion of the stem, .... 



Fig. 5. Face of an internodal joint, 



Fig. 6. Lower or syzygial face of a nodal joint. 



Figs. 7, 8. The ends of two pinnules, showing the termination of the 

 ambulacral skeleton ; from the side, 



Fig. 9. The same ; from above, . . . . . 



