PLATE IX. 



COKALS FROM HIGH-CLIFF, BROOK, BRACKLESHAM, BRAMSHAW, A^'D BARTON. 



TurbinoUa ajjijiis, Duncan. (P. 54.) 

 Fig. 



1 . Cor.illum, natural size. 



2. Corallum, biglily magnified. 



3. Calice, magnified. 



The costal markings are shown in fig. 2. 



Tarbinolia exarata, Duncan. (P. 55.) 



4. Corallum, natural size. 



5. The same, highly magnified. 



6. The calice, highly magnified, showing the projecting costse, the thin wall, and the small columella. 



7. The rudimentary exotheca on the side of one of the costae, and its attachment to the thin wall. The 



portion of the wall is at the bottom of an intercostal space. Magnified. 



TiirhinoUa Forhesi, Duncan. (P. 55.) 



8. Corallum, natural size. 



9. The same, magnified ; the rudimentary costse are seen between those well developed, close to the 



calicular margin. 



10. Calice, magnified, showing the irregular septal arrangement, the rudimentary costse, and the angular 



shape of the columella. 



1 1 . A part of a calice, highly magnified, to show the rudimentary and the perfect costre ; the rudimentary 



costse are sharp, and have no septa. 



Paracyathm Haimei, Duncan. (P. 59.) 



12. Corallum, natural size. 



13. The calice, magnified. It is worn. 



14. Costse, magnified. The exotheca is shown. 



Trochoci/athus Austeni, Duncan. (P. 57.) 



16. Corallum. 



16. Calice, magnified. 



17. One of the septa joined to a costa, showing the spinules ; magnified. 



Paracyatlius cijlindricus, Duncan. (P. 58.) 



18. Corallum, natural size ; adult. 



19. Young corallum. 



20. Calice, magnified. 



21. Side view of a magnified septum, showing the large granules. 



Oculiiia incrustans, Duncan. (P. CO.) 



22. Part of a corallum, slightly magnified. 



23. Part of a corallum, showing the faint costal striae and the absence of granules ; slightly magnified. 



24. Calice, much magnified. 



