_Oysters._--When oysters are cooked in their shells heat opens them; otherwise, some one must open them by hand. A small thin knife with an iron handle is best for this work. The hand in which the oyster is held should be protected with a heavy glove or mitten. If you can find no place where the thin point of the knife can be pushed between the shells, rap the edge of the oyster with the handle of the knife until some little crack is made into which the point can be thrust, then gently but firmly work the shells apart. Put the oysters into a bowl. The opening should be as cleanly a performance as possible, for the oysters are the better for not being washed. Instead of washing them, lift them one or two at a time from one bowl to another, looking them over carefully for any bits of shell. It is better to wash them if they have not been opened in the house. If oysters are to be cooked or served in their shells, the shells must be thoroughly scrubbed. _Clams._--Clams, whether thin shell, or hard shell, should be scrubbed, rinsed, and laid in a pot with not more than a half-cupful of water. Not more, because the juice from the clams should be diluted as little as possible. Cover the pot closely. As soon as the shells open the clams are cooked. When hard shell clams are taken from the shells, clip off with scissors the hard rim from each one. The clam juice should be saved and put aside to settle, the clear liquor can then be poured off. It is used to some extent in nearly all dishes made from clams. If an oyster or a clam has its shells open, pick it up in your hand. If it closes it is all right, if it remains open throw it away for it is dead. Only death prevents these creatures from shutting their doors. _Scallops._--Scallops as we see them on the table or as they come prepared from the market, are really the muscles of the scallop which hold its shells together. Whole scallops are boiled and the muscle removed when the shells open. _Lobsters._--Lobsters are sometimes bought alive, sometimes already boiled. They are not exactly green or brown or blue when alive, but are bright red when cooked. A boiled lobster is opened by splitting the body and tail lengthwise and cracking the claws. The firm white and red meat and a bit called the "coral" are the parts to be eaten. The head, a sand-pouch near the throat, the stomach and intestines and the tough, feathery gills on the under side of the body must not be used. _Crabs._--Hard shell crabs are cooked by plunging them into salted boiling water for fifteen or twenty minutes. They change in colour as lobsters do. If you wish to open them, first remove the little flap which folds down on the under shell, then, placing your thumbs at the place where the flap was fastened on, draw the upper and lower shells apart. A little, grayish sand pocket sometimes adheres to one shell, sometimes to the other. This and the gray, spongy fingers attached to the lower shell should be removed and thrown away.