PLATE IX 



Fig. i. Biddulphia astrolabensis Hendey; valve view. 



Fig. 2. Biddulphia astrolabensis Hendey ; girdle view. 



Fig. 3. Biddulphia astrolabensis Hendey; fragment of valve. 



Figs. 4, 5, 6, 7. Anaulus ellipticus Hendey; cells in girdle view. 



Figs. 8, 9, 10, 11, 12, 13. Anaulus ellipticus Hendey; cells in valve view. 



Fig. 14. Navicula astrolabensis Hendey; valve view. 



Fig. 15. Navicula astrolabensis Hendey ; end of cell in valve view showing 

 lobular markings. 



Fig. 16. Scoresbya Kempii Hendey; cell in valve view. 



Fig. 17. Scoresbya Kempii Hendey; transapical section of cell. 



