PLATE XII. 



Figs. 1-14. Metacrinus angulatus, n. sp. 



Figs. 1, 2. Upper and lower views of the basal ring, 



Figs. 3, 4. Proximal and distal faces of the fourth (axillary) radial,. 



Figs. 5, 6. Proximal and distal faces of the third radial, 



Figs. 7, 8. Proximal and distal faces of the epizygal of the second 

 radial, ....... 



Figs. 9, 10. Proximal and distal faces of the hypozygal of the second 

 radial, ....... 



Fig. 11. Lower or dorsal aspect of a first radial, 



Fig. 1 2. Distal articular face of a first radial, .... 



Figs. 13, 14. An isolated basal, from below and above, 



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Figs. 15-25. Pentackinus asterius, Linn., sp. 



Figs 15, IG. LTppcr and lower views of the calyx, 



Fig. 17. Dorsal aspect of the two outer radials with the first distichals 

 attached, ...... 



Figs. 18, 19. Proximal and distal faces of the third (axillary) radials, 



Figs. 20, 21. Proximal and distal faces of the second radials. 



Fig. 22. Lower or dorsal aspect of a first radial. 



Fig. 23. Distal articular face of a first radial, . 



Figs. 24, 25. An isolated basal, from below and above, 



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