A group of four marine cephalopod molluscs (ammonoidea),
A group of four marine cephalopod molluscs (ammonoidea),

細節
A group of four marine cephalopod molluscs (ammonoidea),
the coiled partitioned shells embedded in limestone -- 10in. (26cm.) high; and single ammonite mounted on a calcite base -- 13in. (33cm.) high

See Illustration
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