SPIRIFER GRANULOsUs, Conrad. 
Fig. 11. Dorsal view of a normal adult, 
Fig. 12. The interior of a pedicle-valve; showing the muscular area and 
delthyrial callosity . 
Fig. 13. The interior of a brachial valve; showing the adductor scars and 
dental sockets. 
Hamilton group. Western New York. 
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