http://www.idscaro.net/sci/01_coll/myst.htm

Placed near Cerithiidae, or inside, or far outside, these shells are
heavy mysteries.
I cannot find even their genus: Orectospira, Basilissa, Trochocerithium...
Regarding the names, I suppose I could have more chances with shells
found in lunar seas: shikokuensis, tectiforme, etc.

But! a miracle could occur; maybe one of you knows something about the
taxonomy, and even the taxon or taxa of these two well preserved shells.
Said to come from SE. Japan, if old crumbly labels say the truth.

Thanks in advance

Olivier

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