PLATE 16 



Heliodinium patriciae Neale & Sarjeant 

 Fig. i. The holotype, V. 51710(1), in lateral view. Photographed by phase contrast. X 500. 



Heliodinium voigti Alberti 

 Fig. 2. Ventral surface of specimen, PF. 3035(4). X500. 



Microdinium cf. ornatum Cookson & Eisenack 

 Fig. 3. A rather large specimen, oblique ventral view. X500. 

 Fig. 4. The same specimen in oblique dorsal view, by transparency. X500. 

 Fig. 5. Ventral surface of specimen, PF. 3050(1). X500. 

 Fig. 6. Dorsal surface of same specimen, viewed by transparency. X 500. 



Hystrichodinium pulchrum Deflandre 

 Fig. 7. Dorsal view of specimen V. 51737(1). X500. 

 Fig. 8. Lateral view of specimen, V. 51737(2), showing archaeopyle. X500. 



Microdinium setosum sp. nov. 

 Fig. 9. Ventral surface of holotype, PF.3046(2). X500. 

 Fig. 10. Dorsal surface of same, viewed by transparency. X500. 



Xiphophoridium alatum (Cookson & Eisenack) 

 Fig. 11. Antapical view of specimen. PF. 3051(1). X 500. 



