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very different names. The object is to find an appellation for it, and other shells, which shall be common to all naturalists; and thus assist you, by reference to their works, to discover every thing that is known respecting them. The shell we have been speaking of, is the helix janthina; and when once you are acquainted with this, its Linnsean name, you may readily find, in books on conchology, such a description of it as would prevent your mistaking any other for it. I believe you already know the three great divisions into which shells are arranged, of univalves, bivalves, and multivalves."
" Yes, mamma," said Lewis, taking up a common whelk, (buccinum,)
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