ART. 22. CYCLOSTOMATOUS BRYOZOA CANU AND BASSLER. 147 



7. Longitudinal thin section, enlarged (after Gregory, 1899). 



8. Branch, X 12, showing two short but complete ovicells. 

 Jurassic (Bathonian) : Ranville (Calvados), France. 



Fig. 9. Spiroclausa spiralis D'Orbigny, 1854 page 92. 



An ovicelled example, X 12, the ovicell being the smooth convex sack 



between the two spires. 

 Cretaceous (IMaastrichtian) : Maastricht, Holland. 



Figs. 10-12. Melicerititcs (Foricula) aspcra D'Orbigny, 1852 page 86, 



Three views of the surface, X 20, illustrating the porelike inter- 

 spaces. 

 Cretaceous (Coniacian) : Villedieu (Loir-et-Cher), France. 



Fig. 13. Meliceritites lamellosnm D'Orbigny, 1852 page 85. 



Frond, X 12, exhibiting the ovicell and oeciostome. 

 Cretaceous (Coniacian): Villedieu (Loir-et-Cher), France. 

 Figs. 14, 15. Raplooccia straminea Phillips, 1829 page 97. 



14. Diagrammatic drawing of the tj'pe .specimen, enlarged (after Gregory). 



15. Photograph of another example, X 25. 



Jurassic (Bathonian) : Ranville (Calvados), France. 



Plate 15. 



Figs. 1-8. Ripiscoecia conifera Lamouroux, 1821 page 94. 



1. Small zoaria natural size, of the dwarfed form called conifera. 



2, 3. Large branching zoaria natural size of the form ramosa. 



4. Surface of a branch, X 12, illustrating the flabelliform, transversely 



wrinkled ovicell. 



5. A frequent aspect of the zoarial surface, X 2, with some of the meso- 



pores closed by a fragile epitheca. 



6. Surface, X 25, in which the mesopores are open. 



7. Portion of a branch, X 12, with salient peristome and both open and 



closed mesopores. 



8. An example, X 12, in which the mesopores lack the calcareous lamella. 

 Jurassic (Bathonian) : St. Aubiu and Luc (Calvados), France. 



Figs. 9-12. Ci/clociies primogenitum, new species page 88. 



9. Tlie narrow ramose zoarium, natural size. 



10. Surface X 25, illustrating the hexagonal facettes and the orbicular 



aperture often closed by a calcareous lamella. 



11. Fragment of surface, X 25, in which tlie facettes have been destroyed. 



12. An ovicelled branch, X 12, showing a portion with the facettes pre- 



served. The two ovicells placed side by side are little convex and 

 their oeciostome Is orbicular. 

 Jurassic (Bathonian) : Ranville (Calvados), France. 



Plate 16. 



Figs. 1-7. (Irainmecava dumetosa Defranoe, 1824 page 96. 



1. The compressed branching zoarium, natural size. 



2. Surface of branch, enlarged (figs. 1, 2, after Michelin, 1846). 



3. End of a branch, X 12, without facettes. 



4. Portion of same, X 25. 



5. 6. An example, X 12, and portion, X 25, exhibiting the facettes and 



closed apertures. 

 7. End of a branch, X 12, showing the median lamella. 

 Jurassic (Bathonian) : Ranville (Calvados), France. 



