ART. 22. CYCLOSTOMATOUS BRYOZOA — CANU AND BASSLER. 149 



6. Surface of the same, X 25, showing a portion with open mesopores. 



7. An ovicell, X 12, with the external wall broken away. 



8. Zoarial surface, X 25, exhibiting mesopores closed by a calcareous 



lamella. 



9. Another surface, X 12, with a zone of open mesopores and a zone of 



closed ones. 

 Cretaceous (Greensand) : Chamboy (?Franee). 



Plate 19. 



Figs. 1-9. Filicrisina verticillata D'Orbigny, 1852 page 137. 



1. Zoarial fragments, natural size. 



2. Dorsal side of branch, X 25. At the top the facettes inclosing the dacty- 



lethrae are lozenge shape and perforated by a longitudinal slit. At the 

 bottom the second calcareous layer bears round orifices. 



3. Dorsal surface, X 25. Here the orifice of the lozenge-shaped facettes is 



little elongated and is not surrounded by a salient peristome. 



4. Dorsal surface, X 25, with a second calcareous layer in which case the 



orifice perforating the facette has a round salient peristome. 



5. Frontal surface, X 25, with tubes having salient peristomes. 



6. Frontal side, X 12, with peristomes little salient. 



7. Another frontal, X 12, in which the quincunx arrangement of the peri- 



stomes is apparent. 

 8,9. Two ovicelled fragments, X 12, showing lateral position of ovicells. 

 Cretaceous (Campanian) : Longuesse (Seine-et-Oise), France. 



Fig. 10. Cavarinella ramosa Marssou, 1887 page 135. 



An ovicelled specimen, X 12, showing position of the genus Cavarinella 



in the Ascosoeciidae. 

 Cretaceous (Danian) : Herfolge (Seeland), Denmark. 



Fig. 11. Parascosoecia marssoni Gregory, 1899 page 115. 



Fragment with ovicell, X 12. 



Cretaceous (Danian) : Herfolge (Seeland) Denmark. 



Fig. 12. Parascosoecia francqana D'Orbigny, 1852 page 115. 



Specimen, X 12, exhibiting ovicell of the Ascosoeciidae. 

 Cretaceous (Danian) : Herfolge (Seeland), Denmark. 

 Figs. 13-18. Sulcocava cristata D'Orbigny, 1S54 page 134. 



13. Edge of zoarial fragment, X 12, showing ovicell. 



14. Broad side of branch, X 12, traversed by longitudinal sulci. 



15. Portion, X 25, showing small vacuoles at base of the sulci. 



16. Broad side of ovicelled branch, X 12, showing ovicell on edge. 



17. Edge of a broad branch, X 12. 



18. Edge view of the extremity of a branch, X 12. 

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



Plate 20. 



FiGB. 1-8. Polyascosoecia coronopus, new species page 126. 



1. Zoarial fragments, natural size. 



2. Zoarium with expanded base, X 6. 



3. Lateral view of an ovicelled branch, X 12. 



4. Anterior side of branch with broken ovicell, X 12, showing that it 



is a vesicle arranged above the tubes. 



5. Another ovicelled example, X 12. The tubes of the fascicles surrounded 



by the ovicell have a slightly larger diameter. 



