PLATE III. 



Fig. 1. Cladocora arbuscula Miliie-Edw. and Haime, natural size. 



Fig. 2. Cladocora arbuscula Milne-Edw. and Haime, with polyps expanded, natural size. 

 Fig. 3. Cladocora arbuscula Milne-Edw. and Haime, calicle, magnified. 



Fig. 4. Cladocora arbuscula Milne-Edw. and Haime, calicle with buccal membrane dried, magnified. 

 Fig. 5. Cladocora arbuscula !Milne-Edw. and Haime, vertical and horizontal sections of branches, show- 

 ing dissepiments, magnified. 

 Fig. 6. Cladocora arbuscula Milne-Edw. and Haime, polyp expanded, magnified. 

 Fig. 7. Cladocora arbuscula Milne-Edw. and Haime, young calicle, magnified. 

 Fig. 8. Oculina varicosa Lesueur, calicle, magnified. 

 Fig. 9. Oculina varicosa Lesueur, section of calicle, magnified. 

 Fig. 10. Oculina diffusa Lamarck, calicle, magnified. 



Fig. 11 and 12. Oculina difiusa Lamarck, groups of calicles, slightly magnified. 

 Fig. 13. Oculina diffusa Lamarck, transverse section of branch through calicles, magnified. 

 Fig. 14 and 15. Oculina pallens Ehr., calicle, magnified. 

 Fig. 16. Oculina pallens Ehr., tiunsverse section of branch, magnified. 

 Fig. 17. Oculina pallens Ehr., longitudinal section of branch, showing also transverse section of three 



calicles. 

 Fig. 18 and 19. Stylaster sanguineus Val., front and .side views, natural size. (The researches of Moselcy 



have shown the Stylasterida3 to be Hydroids. They were drawn on tlie same plate with 



Oculinida) on account of their supposed relations to that family, according to Milne-Edw. 



and Haime. 

 Fig. 20. Stylaster sanguineus Val., side view of branch, magnified, showing calicles in a row on the side. 



The front of the branch, seen in profile, is smooth. Tlie back, on the left, shows the ampulla) 



containing the gonophores. 

 Fig. 21. Stylaster sanguineus Val., Ampulla; containing the gonophores, magnified. 

 Fig. 22. Stylaster sanguineus Val., vertical section of calicle and part of a horizontal section below, 



magnified. The small holes surrounding the central opening in the lower section ought also 



to be shown in the intervals between the pseudo septa in the vertical section. The style 



ought to be represented somewhat hirsute. 

 Fig. 23. Stylaster sanguineus Val., rear surface of branch, magnified. 

 Fig. 24. Stylaster sanguineus Val., calicle, magnified. 



