4 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



EXPLANATION OF PLATE 



Pagecrinus gracilis, new genus and species 



Fig. 1. Large specimen X 2, view (rom the left posterior radius, showing the' 

 striking similarity of the basal portion of the ventral sac and the 

 arms. 



2. Specimen X 2 showing proximal portion of the column and three primi- 



brachs in the right anterolateral radius. 



3. Specimen X 2 as seen from the posterior interradius showing basal 



portion of ventral sac and three primibrachs in the right posterior 

 radius. 



4. Specimen X 2 showing ventral sac curving outward and extending for 



some distance horizontally beyond the arms. 

 5-6. Details of arm fragments X 3, showing ramules. 

 7. Generic diagram of cup-plates X 4. 



o 



1 



