Plate 12 



Page 

 Figs. 1-12. Mdiceritites transversa, new ^:)ecies 64 



1. Two branches, natural size. 

 2,3. Ovicelled specimen, X12 and X2.5. The peristomes 

 are salient and arranged in transverse rows. 



4. Zoarium, X12, with peristomes little salient. 



5. Same specimen as Figure 4, X25. Portion where 



the peristomes are irregularly arranged. 



6. Another surface of Figure 3, X25, illustrating por- 



tion with peristomes arranged in oblique rows. 



7. Multilameller specimen, X 12. The central zoarium 



is surrounded by two exterior lamellae. 



8. Same specimen as Figure 7. Portion of an exterior 



lamella, X25, showing peristomes irregularly ar- 

 ranged and a regenerated zooecium at the top. 

 9, 10. Zoarial base, X6, and portion, X12, showing the 

 multiplicity of the exterior lamellae. 



11. Portion of exterior lamellae same example, X20, 



showing little salient, subcircular peristomes. 



12. Basal part of zoarium, XG. 



Lower Cretaceous (Aptian) : Faringrlon, England. 



Figs. 13-15. Meliceritites, species 07 



13, 14. Two branches, xr2. 

 15. Surface, X25. 



Lower Cretaceous (Aptian) : Fariugdon, England. 



105 



