PLATE XVIII. 
Fig. 1. Madrepora cervicornis Lamarck, part of branch. 
Fig. 2. Madrepoia cervicornis Lamarck, section through branch near the tip, showing the terminal calicle 
in the centre. 
Fig. 3. Madrepora cervicornis Lamarck, terminal calicle, magnified. 
Fig. 4. Madrepora cervicornis Lamarck, terminal calicle from above, with surrounding lateral ones. 
Fig. 5. Madrepora cervicornis Lamarck, ontline of terminal polyp expanded, magnified. 
Figs. 6, 7. Madrepora cervicornis Lamarck, outlines of e.xpanded 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 branches beginning to shoot up. 
Fig. 9. Madrepora cervicornis Lamarck, calicles, magnified. 
