PLATE 7 



Fig. i. Oligosphaeridium complex (White). Neotype, lateral view. PF.3034(i) 

 X500. 



Fig. 2. Oligosphaeridium complex (White). Cenomanian (borehole depth, 840 feet). 

 Lateral view PF.3035(5). X 500. 



Fig. 3. Polysphaeridium pumilum sp. nov. Holotype, PF.3037(i). X975. 



Fig. 4. Polysphaeridium pumilum sp. nov. Cenomanian (borehole depth, 770 feet). 

 FM.77o/7(i). X975- 



Fig. 5. ICordosphaeridium fasciatum sp. nov. Holotype, ¥.51719(1). X975. 



Fig. 6. ICordosphaeridium fasciatum sp. nov. Holotype. Nature of fibrous peri- 

 phragm well shown. X975. 



Fig. 7. Litosphaeridium siphonipho rum (Cookson & Eisenack). Cenomanian (borehole 

 depth 750 feet). Apical view showing 6-sided archaeopyle surrounded by 6 precingular pro- 

 cesses. PF. 3037(3). X500. 



Fig. 8. Litosphaeridium siphon iphorum (Cookson & Eisenack). Cenomanian (bore hole 

 depth, 770 feet). Antapical view. FM.77o/i(i). X500. 



Fig. 9. Hystrichosphaeridium radiculatum sp. nov. Cenomanian (borehole depth, 690 

 feet). PF.303o(3). X500. 



Fig. 10. Oligosphaeridium reticulatum sp. nov. Holotype, lateral view, PF.3035(i). 

 X500. 



