Plate 14 



Page 

 Figs. 1-11. Siphodictyum irngulare, new specic>i 89 



1. Zoarial fragments, natural size. 



2. Noncellular posterior face of zoariuni, X12. The 



vacuoles are placed at the l)ottorn of the ()i)lique 

 sulci. 



3. Surface, X25, showing the arrangement of the frontal 



vacuoles between the peristomes. 

 4, 5. The two faces of the same zoarium, X12. The peri- 

 stomes are arranged in ciuincunx. 

 G. Celluliferous (anterior) face, y(l'2. The peristomes 

 are arranged in regular or interrupted transverse 

 rows. 

 7, 8. Two zoaria, X12. The celluliferous spaces alternate 

 with the noncellular spaces. 

 9,' 10. Two branches, X 12. At the extremity of the branches 

 the peristomes are arranged entirely around the 

 colony. 

 11. Same specimen as Figure 9, X2.5. 



Lower Cretaceous (Aptian) : Faringdon, England. 



Figs. 12, 1.3. Loho!<oecia seiniclausaMicheUn, \S4:5 63 



12, 13. Branch, X12 and X25. The facettes are elon- 

 gated. 

 Lower Cretaceous (Aptian): Faringdon, Eng- 

 land. 

 Figs. 14-21. Siphodictyum gracile Lonsdale, 1849 87 



14. Two l^ranches natural size. 



15. Branch, X25. The peristomes are incomplete or 



interrupted transverse lines. There are 4 to 6 

 vacuoles to a tube. 



16. Lateral view of same specimen, X2.5. 



17. Dorsal view, X2.5, with vacuoles placed at the bot- 



tom of the sulci. 



18. Surface, X25, with the peristomes placed in quin- 



cunx. There are 4 vacuoles to a tube. 



19. Dorsal face, X25. The vacuoles are at the bottom 



of the very obliciue sulci. 



20. Celluliferous face of a specimen, X12, in which the 



orifices are arranged almost around the colony, 

 the dorsal face being very small. 



21. Dorsal side of the same specimen, X12. 



Lower Cretaceous (Aptian) : Faringdon, England. 



107 



