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PLATE III. 
_ 1. Physogyra aperta, a part of the corallum ; natural size. 
Fig. 1. A part of the wall, with dissepiments ; vertical section. 
g. 2. Goniastrea multilobata, a part of the corallum ; natural size 
Fig. 2a. Magnified view of an elongated calicle, with developing centres. 
Fig. 2. A vertical section of a calicle ; magnified. 
Fig. 2c. A view of the dissepiments, as seen in a vertical section through the centre of a calicle. 
. 3. Goniastrea coronalis, a part of the corallum ; natural size. 
Fig. 3a. A calicle ; magnified. 
. 4. Goniastrxa laxa, a part of the corallum ; natural size. 
Fig. 4a, A surface view of the wall where it is much thickened. 
Fig. 4b. A surface view of the wall where it is thin. 
Fig. 4c. A vertical section of a part of the wall, with dissepiments. 
Fig. 4d. A view of septa and dissepiments, as seen in a vertical section through the centre of 
the calicle. 
. 5. Ulophyllia aspera, a part of the corallum ; natural size. 
Fig. 5a. A vertical section of a part of the wall, with opposite septa. 
Fig. 5). A view of a part of the under surface, with costz. 
. 6. Ulophylha cellulosa, a part of the corallum ; natural size. 
Fig. 6a, A vertical section of a part of the wall, with septa and dissepiments. 
Fig. 6). A view of the under surface, with vesicles and coste. 
Fig. 6c. A lateral view of a part of a ridge, with the septa rubbed down to lay bare the 
abundant endotheca. 
