PLATE XXVI. 



Pentaceintjs alteenicirrus, n. sp. 



Fig. 1. The disk, ....... 



Fig. 2. The anal interradius, enlarged, .... 



Figs. 3, 4. Inner and outer surfaces of the two outer radials with the 

 distichals and palmars attached, .... 



Figs. 5, 6. The third or axillary radial, .... 



Fig. 5. Proximal face. 

 Fig. 6. Distal face. 



Figs. 7, 8. The second radial, ...... 



Fig. 7. Proximal face. 

 Fig. 8. Distal face. 



Fig. 9. The lower face of a first radial, with one basal remaining 

 attached, .... 



Fig. 10. Distal face of a first radial, 



Fig. 11. The calyx from below, 



Fig. 12. Side view of a nodal and infra-nodal joint in their relative 

 positions, .... 



Figs. 13, 14. Upper and lower faces of a nodal joint, 



Figs. 15, 16. Upper and lower faces of the infra-nodal joint, 



Fig. 17. Faces of internodal joints. 



Fig. 18. Various stages in the development of internodal joints 



Diam. Page 



X 3 n 



X 5 11 



X 

 X 



X 

 X 



X 



X 



X 

 X 



3 

 3 



3 



3 

 3 



4 

 4 

 4 

 4 

 4 



50 

 5 



293 



9 



33 



13 

 323 

 13 

 12 

 12 



