Crate containing adult crabs for observation. It measured 2 by 2 by 4 feed and consisted of an iron frame covered with chicken wire fencing with a 1-inch mesh. It was divided into four vertical compartments to prevent the crabs crowding together and to prevent the escape of all the crabs in case the wire was torn at any point. A wire bail was attached at each end and brought together over the top in the middle. To their point of union a wire was secured by which the crate was lowered and raised
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