A1 Saturday and Sunday, or Friday evening until Sunday night; the part of the week in which many people living in the West do not go to work: This/Next weekend we're going to see some friends. I have a lot of homework to do over the weekend. He spent the weekend fishing with his brother.
clams, mussels, oysters, and scallops (class Bivalvia) 1  ark shell (family Arcidae) 2  cockles (family Cardiidae) 3  coquina clam (genus Donax) 4  gaper clams (Tresus nuttallii and Tresus capax) 5  geoduck (Panopea generosa) 6  jingle shells (family Anomiidae) 7  mussels (families Mytilidae and Unionidae) zebra mussel (genus Dreissena) 8  genus Nuculana.
Types of Mollusk: Snails, Bivalves, Squid, and More. Most people think of mollusks as slow-moving creatures, like snails, or animals that hardly move at all, like mussels. This is only part of the picture. The oceans of the world were once dominated by schools of predatory mollusks called ammonites with sharp beaks and a surprising turn of speed.