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PLATE VI. 
. Fungia tenwidens, the wpper surface of the corallum ; natural size. 
Fig. la. A portion of the under surface ; natural size. 
. Fungia rugosa, a part of the upper surface ; natural size. 
Fig. 2a. A part of the under surface ; natural size. 
. Cycloseris discus, the upper surface of the corallum ; natural size. 
Fic. 3a. The under surface ; natural size. 
. Cylloseris incrustans, the corallum ; natural size. 
Fig. 4a. A part of the corallum ; magnified. 
Fig. 4b. A part of the under surface. 
. Podabacia robusta, a part of the corallum ; natural size. 
Fig. 5a. A calicle ; magnified. 
ic, 5b, A marginal part of the under surface. 
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. Psammocora ramosa, a part of the corallum ; natural size. 
Fig. 6a. A branchlet ; magnified. 
Fig. 6). A part of the surface ; more highly magnified. 
