PLATE XXXIII. 



Figs. 1-3. Pentacrinus blakei, P. H. Carpeuter. 



Fig. 1. The ambulacral skeleton of a pinnule ; from the side, 



Fig. 2. Portion of a ray, consisting of the two outer radials, the dis- 

 tichals, and the three lowest brachials ; from the side, 



Fig. 3. Portion of a brachial ambulacrum ; from above, 



Figs. 4-6. Pextacrinus decorus, Wyv. Thoms. 



Fig. 4. Portion of a brachial ambulacrum ; from above, . . x 12 337 



Fig. 5. Vertical section of the calyx, passing a little to one side of the 



middle line; from a preparation made Dr. W. B. Carpenter, x 8 293 



Fig. 6. Ventral aspect of one of the lower arm-divisions, showing the 



ambulacral skeleton, . . . . . x 7 337 



Figs. 7-10. Pentacrinus mollis, n. sp. 



Fig. 7. The disk, . . . . . . . x 7 338 



Fig. 8. The calyx ; from beneath, . . . . . x 6 338 



Fig. 9. The anterior and left antero-lateral rays, . . . x 6 338 



Fig. 10. The right postero-lateral ray, . . . . . x 6 338 



