Plate 4 



Page 

 Figs. 1-4. Newxitifera reticulatd D'Orl)igny, 1853 45 



1. Fragments, natural size. 



2. Bifurcated branch, not reticulated, X12. 



3. Portion of reticulated specimen, X12. 



4. Same specimen as 3, X25, showing a regenerated tube. 

 Lower Cretaceous (Valangian): .Sainte-Croix, Switzer- 

 land. 



Figs. 5-7. Nemalifera incnistans, new species 46 



5. Zoarium, natural size. 



6. Portion of surface, X12. 



7. Fragment of the zoarial surface, X12, showing the ovi- 



cell (broken) and the short zone of growth. 

 Lower Cretaceous (Valangian): Saintc-Croix, Switzer- 

 land. 

 Figs. 8-11. Nematifera reticuloides, new species 47 



8. Fragments, natural size. 



9. Slightly worn specimen, X12, on which the peristomes 



are arranged in close transverse groups (Peripora). 



10. Extremity of a young bifurcated branch, X12, showing 



the zone of growth. 



11. Fragment of a reticulated specimen, X12. 



Lower Cretaceous (Valangian): Sainte-Croix, Switzer- 

 land. 



Fig. 12. Nematifera acuta D'Ov\ngny, 1853 46 



Fragment, X12. 



Lower Cretaceous (Valangian): Sainte-Croix, Switzerland. 

 Figs. 13-15. Trigonoecia tubulosa D'Orhigny, 1853 37 



13. Zoaria, natural size. 



14. Ovicelled specimen, X12. The occiostome is minute 



but long and salient. 



15. Specimen, X12, showing two large ovicells. 

 Lower Cretaceous (Valangian) : Sainte-Croix, 



Switzerland. 



F ui . 16. D iapcroecia simplex, new species 50 



The ovicelled type specimen, X12. 



Lower Cretaceous (Aptian) : Faringdon, England. 



07 



