PLATE XXI. 
Fig. 1. Rhipidigorgia flabellum Valenciennes, reduced about one half. 
Fig. 2, 4. Rhipidigorgia flabellum Valenciennes, niagniiied portions, showing the polyp-ceUs empty 
and dried. 
Fig. 5. Rhipidigorgia flabellum Valenciennes, a planula, magnified (?). (No explanation of this figure 
could be found.) 
Fig. 6. Rhipidigorgia flabellum Valenciennes, a small portion of the corallum, natural size, with partly 
expanded polyps. 
Fig. 7. Rhipidigorgia flabellum Valenciennes, branchlet partly denuded of its cortical portion, and show- 
ing the hornv a.xis. 
