Hence the name of gasteropeda pulmonifera. "This mollusca is oblong, and of different sizes, from three to eighteen inches in length; and I have seen a few that were not less than two feet long. They were nearly round, a little flattish on one side, which lies next to the bottom of the sea; and they are from one to eight inches thick.
If I am not much mistaken, the celebrated Cuvier calls it gasteropeda pulmonifera.
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