PLATE XXXIX. 
METACRINUS ANGULATUS, n. sp. 
1. The calyx and arm-bases, 
2. The disk ; an abnormal specimen, having a second smaller anal 
tube by the side of the ordinary one, 
3. Portion of the stem, . 
s. 4, 5. Upper and lower faces of a nodal joint, 
Figs. 6, 7. Upper and lower faces of an infra-nodal joint, 
8. An ordinary internodal joint, 
9. Lower face of a supra-nodal joint, 
. 10. Internodal joint of a varietal form of stem, 
. 11. Side view of a portion of this stem, 
. 12. The ambulacral skeleton of a pmnule ; from above, 
. 13. An arm-groove and brachial ambulacrum, 
Diam. 
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