PLATE XII. 
Fig. 1. Agaricia agaricites Milne-Etlw. and Haiine, natural size. 
Fig. 2. Agaricia agaricites Milne-Edw. and Haime, two calicles, magnified. 
Fig. 3. Parasitic cirrhiped covered with coral growth, magnified. Three of them are seen in natural 
size in fig. 1. 
Fig. 4. Porites clavaria Lamarck, natural size. 
Fig. 5. Porites clavaria Lamarck, three calicles, magnified. 
Fig. 6. Porites clavaria Lamarck, section through branch, magnified. 
Fig. 7. Porites furcata Lamarck, natural size. 
Fig. 8. Astrangia solitaria Verrill, natural size, branching variety. 
Figs. 9, 10. Astrangia solitaria Verrill, calicles magnified. 
Fig. 11. Astrangia solitaria Verrill, spreading variety, natural size. 
Fig. 12. Astrangia solitaria Verrill, part of stolon witli two calicles, magnified. 
Fig. 13. Colangia imniersa Pourtales, natural size (lUust. Cat. Mus. Comp. Zobl. No. IV.). 
Figs. 14, 15. Colangia immersa Pourtales, calicle magnified in profile and from above. 
