Plate 7 



Page 

 Figs. 1, 2. Fa-^ciruli pora flabellata D'Orbigiiy, 1853 51 



1. Lateral view of a specimen, X6, with little expanded 



base. 



2. Zoarium, X6, viewed from above, showing the orifices 



of the tubes at the extremity of the fronds. 

 Lower Cretaceous (Valangian): Sainte-Croix, Switzer- 

 land. 

 Figs. 3, 4. Plethopora aptensis, new species 53 



3. Zoaria, natural size and enlarged. 



4. Bifurcated zoarial fragment, X12. 



Lower Cretaceous (Aptian) : Faringdon, England. 

 Figs. 5-7. Retenoa cam pichcana D'Orhigny, 1853 56 



5. Fragments, natural size. 



6. Posterior noncellular (dorsal) face of a branch showing 



an ovicell below a bifurcation, X12. 



7. Cellular (anterior) face of a bifurcated branch, X12. 

 Lower Cretaceous (Valangian) : Sainte-Croix, Switzer- 

 land. 



Figs. 8-12. Chartecijtis coinpressa, new species 55 



8. Zoarium, natural size. 



9. Bifurcated zoarial fragment, W'l. The orifices of the 



tubes are lozenge-shaped slits. 



10. Compressed zoarial with trace of ovicell, X12. 



11. Surface of same specimen, X25. 



12. Extremity of a liranch showing the conical zone of 



growth. 

 Lower Cretaceous (Valangian) : Sainte-Croix, Switzer- 

 land. 



100 



