150 PROCEEDINGS OY THE NATIONAL MUSEUM, vol, 61. 



6. Frontal face of a zoarium showing tubes and mesopores, X 25. 



7. Posterior or dorsal side, X 2.5, exhibiting vacuoles. 



8. Zoarial fragment, X 6, with a subsymmetrical ovicell surrounding four 



fascicles. 

 Miocene (Helvetian) : Mus (Gard), France. 

 Figs. 9-14, Crisina normaniana D'Orbigny, 1852 page 118, 



9. Zoarium, natural size. 



10-12. Lateral, dorsal and frontal views of a fragment showing aspect of 

 zooecial tubes on the frontal face and of the vacuoles on the dorsal 

 side, (figs. 9-12, after D'Orbigny, 1852). 

 13, 14. Lateral and frontal view of an ovicelled branch, X 12. 



Cretaceous (Coniacian) : Fecamp (Seine inferiore), France. 



Figs. 15-21. Crisina friangularis D'Orbigny, 1851 page 118. 



15-17, Frontal, dorsal, and lateral views of a branch, magnified, 



18, Dorsal side, magnifietl, showing the vacuoles (figs. 1.5-18, after D'Orbigny, 



1852). 

 19,20. Transverse and longitudinal sections, magnified (after Marsson), 

 21, Tangential section of the dorsal, X 25, showing the orifice of the 

 vacuoles. 

 Cretaceous (Coniacian): Tours (Indre-et-Loire). etc., France, 



Plate 21. 



Figs, 1-6. Grammanotosoecia contorta, new species page 123. 



1. Zoarial fragments, natural size, 



2. Surface of an example, X 12, showing two ovicells. 

 Cretaceous (Campanian) : Brossac (Clmrente), France, 



3. A fragment, X 12, in which the orifices are arranged in groups. 



4. The same specimens, X 25. 



Cretaceous (Santonian) : Saint Bonnier (Charente), France. 



5. An example X 12, in which the orifices are large and arranged as in 



Zonopora. 



6. Portion of the same specimen X 25. 



Cretaceous (Santonian) : Saint Medard (Charente), France. 

 Figs. 7, 8. Grammascosoecia parripora, new species page 122, 



7. The cylindrical zoarium, natural size. 



8. The same, X 12, illustrating the ovicell. 

 Cretaceous (Maastrichtian) : Maastricht, Holland. 



Figs. 9, 10. Grammascosoecia porosa, new species page 121. 



9. Zoarial surface X 12, showing the arrangement of the zooecial orifices 



around elliptical porous areas formed of mesopores. 



10. View of the same surface, X 25. 

 Recent: South Africa. 



Plate 22. 



Figs. 1-5. Reteporidca royana D'Orbigny, 1854 page 129. 



1. Zoarium natural size, 



2. Anterior (celluliferous) side of branch, enlarged, showing the tubes 



and mesopores. 



3. Posterior (dorsal) side enlarged, exhibiting the vacuoles. 



4. A further enlargement of the anterior side. 



5. Edge view of branch, enlarged, showing tubes to the left and vacuoles 



to the right (figs. 1-5 after D'Orbigny, 1850). 

 Cretaceous (Maastrichtian) : Royan, etc., France. 



