Plate 10 



Page 

 Figs. 1-4. Ceriocava tenuirama, new species 70 



1. Fragments of zoarium, natural size. 



2. Specimen, X12, showing the habitual aspect. 



3,4. Example, X12 and X25, showing tubes with facettes 

 and an orbicular orifice. 

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

 land. 

 Figs. 5-12. Diplocava inconditn, new species 71 



5. Fragments, natural size. 



6. Specimen, X6, showing normal aspect. The groups of 



large tubes are surrounded by small tubes with 

 facettes. 

 7, 8. Surface of arborescent zoarial fragment, X 12 and X2.5, 

 with monomorphic tubes. 

 9,10. Bilamellar zoarial fragment, X 12 and X2.5, showing 

 tubes with facettes. 



11. Ovicelled lamellar zoarium, X12. The parts with 



large orifice are little visil^le. The ovicell is star- 

 shaped with four branches. 



12. Group of large zooecia without facettes, X25. 

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

 land. 



103 



