PLATE XVIII. 



Fig. 1. Madrepora cervicornis Lamarck, part of branch. 



Fig. 2. Madrepora cervicornis Lamarck, section through bi'anch near the tip, showing the terminal calicle 

 in the centre. 



Fig. 3. Madrepora cerviconiis Lamarck, terminal calicle, magnified. 



Fi". 4. Madrepora cervicornis I^amarck, terminal calicle from above, with surrounding lateral ones. 



Fig. 5. Madrepora cervicornis Lamarck, outline of terminal polyp expanded, magnified. 



Figs. 6, 7. Madrepora cervicornis Lamarck, outlines of expanded lateral polyps near the tip, magnified. 



Fig. 8. Madrepora cervicornis Lamarck, base of a colony showing spreading mode of growth over a for- 

 eign body, with liranches beginning to shoot up. 



Fig. 9. Madrepora cervicornis Lamarck, calicles, magnified. 



