146 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 61. 



Figs. 12-16. Meliceritites magnifica D'Orbigny, 1852 paire So. 



12, 13. Two ovicells, X 12, showing variation in form. 



14. An example, X 12, with well developed pyriform ovicell. 



15. Open (broken) ovicell, X 20, showing underlying zooecia completely de- 



veloped. 



16. Similar ovicell, X 20. with underlying zooecia lacking the frontal calci- 



fied wall. 

 Cretaceous (Couiacian), Villedieu (Loire-et-Cher), France. 

 Figs. 17-22. Meliceritites angulosa D'Orbigny, 1852 page 84. 



17. An eleocellarium with a regenerated zooecium, X 20. 



18. Ovicelled branch, X 12, showing one complete and one broken ovicell and 



several large eleocellaria. 



19. An ovicelled branch, X 12, in which the oeciostome is transformed into 



an eleocellarium. 



20. Distal end of open ovicell, X 66. 



21. Distal part of open ovicell, X 34, viewed from the proximal end. 



22. Transverse section of an ovicelled branch, X 14, of M. magnifica (figs. 



12, 13, 15-17, 20-22, after Levinsen). 

 Cretaceous (Coniacian) Chatham, England (fig. 17), Villedieu and 

 Tours, France. 



Plate 13. 



Figs. 1—4. Meliceritites gracilis Goldfuss, 1827 page 83. 



1, 2. Well preserved, ovicelled branch, X 12 and natural size. 



3. Ovicelled portion of the same specimen, X 12. 



4. Surface, X 25, exhibiting the semilunar orifice and triangular peristomes. 

 Cretaceous (Cenomanian) : Essen, Germany. 



Figs. 5-7. Scmimultelea escharoidcs Goldfuss page 87. 



5. Zoarium natural size, consisting of an elongated multilamellar mass, 



6. View of apertures enlarged, given by Goldfuss. 



7. Photograph of best preserved surface noted, X 12, showing the orifices 



and eleocellaria. 

 Cretaceous (Cenomanian) : Essen, Germany. 



Fig. 8. Psilosolen capitiierax, new species page 112. 



End view of branch, X 12, showing ovicell. 

 Pleistocene : Santa Barbara, California. 



Figs. 9, 10. Tretocycloccia pelliculata Waters, 1879 page 110. 



9. Tangential thin section, X 25, illustrating vesicular structure of walls. 

 10. Fragment of branch, X 12, showing usual aspect of zooecia and meso- 

 pores in upper fourth and the large ovicell below. 

 Pacific Ocean : Neah Bay, Washington. 



Figs. 11-13. Entolophora (fNematifera) roemori Levinsen page 20. 



11, 12. Fragment natural size and X 12, showing the semielliptical orifices. 



13. Surface of same, X 25, exhibiting a sort of eleocellarium. 

 Cretaceous (Cenomanian) : Essen, Germany. 



Plate 14. 



Figs. 1-8. Ceriocara cnrymlosa Lamouroux, 1821 page 90. 



1, 2. The branching zoarium, natural size and the surface, enlarged (after 



Michelin, 1847). 

 3, 4. Basal part of zoarium, natural size and an enlarged view of the tubes 



(after Haime, 1854). 

 5, 6. Surface of branch, X 12 ; the broken ovicells show the special walls. 



