PLATE XX. 



pn, first pinnule. r^, /■', >•', second, third, and fourth radials. 



pn", second pinnule. rw, rio', proximal and distal wedge-shaped projections from the 



)■', first radial. inner face of first radial. 



1. Dorsal view of the calyx. 



2. Interior view of radials from the first radial to the joint above the base of the second pinnule. 



3. Distal face of the first radial. 



4. Side view of the first radial. 



5. Proximal face of tlie first radial. 



6. Proximal face of the second radial. 



7. Distal face of the second radial (third articulation, including the syzygy). 



8. Distal face of the third radial. 



9. Muscular bundles of the first radial, extending across from the wedge-shaped projections, rw, rw' 



