Mollusks, from land snails and slugs to oysters and mussels in the sea, have a few things in common. They have a head. They have a soft middle part that holds their organs. Then, some have a muscle ...
"This is the first supplement to the Catalogue and Bibliography of the Marine Shell-bearing Mollusca of Japan ... published in 1999"--P. 4. siris_sil_675669 ...
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