PLATE XLVII. 
Figs. 1-5. METACRINUS WYVILLII, n. sp. 
Diam, Page 
Figs. 1, 2. Portions of the stem, ; : ; , Se 4 359 
Figs. 3, 4. Upper and lower faces of an infra-nodal joint, : x aR 9 13 
Fig. 5. Upper face of a nodal joint, . ; : ; oN Xone 13 
Figs. 6-9. METACRINUS VARIANS, 0. Sp. 
Fig. 6. Portion of the stem, commencing with an infra-nodal joint, 
and inverted, ; : : : d Bee,” | a) 355 
Figs. 7, 8. Lower and upper faces of a supra-nodal joint, P Pte: 8 343 
Fig. 9. Upper face of a nodal joint, . : ; : cS 8 13 
Fig. 10. The end of a pinnule; from above, . : -. “os oie 55 
Fig. 11. The lower part of a pmnule ; from the side, . : X25 82 
Fig. 12. The arm-groove and brachial ambulacrum, . : . ae 82 
Fig. 13. MrracrINnus COSTATUS, 0. sp. 
Fig. 13. The lower part of the ambulacrum of a middle pinnule, : =e 364 
