PLATE I. 



CORALS FROM THE CHALK. 



Fig. 



1. The corallum of CaryophylUa Lousdalei, Duncan. (P. 3.) 



2. The caUce and columella, magnified. 



3. The costse, magnified. 



4. The corallum of CaryophylUa Tennanti, Duncan. (P. 4.) 



5. The calice, magnified. 



6. The costse, magnified. 



7. CaryophylUa cyUndracea, Reuss, sp. (P. 3.) On a Belemnite. 



'•1 



9. > Unusual shapes of this species. 



lO.J 



11. A calice, magnified, showing the small pali noticed in many specimens. 



12. A septum, its dentation, and a portion of one of the pali, magnified. 



