Abstract: A lamina storage device comprising a spine, first and second leaves hingedly secured to the spine to permit hinging movement of the leaves between a closed position of the device in which the leaves and spine define a hollow interior of the device and an open position for insertion and removal of a lamina to be stored, and a lamina support carried by the spine, the lamina support comprising a pair of resilient arms projecting when the device is in the closed position from the spine into the hollow interior of the device between the leaves, each arm having a groove extending therealong and the grooves facing one another and into the hollow interior, the grooves of the arms being spaced apart a distance suitable for receiving edge portions of the lamina to be stored in the grooves, the arms having a length greater than the effective radius of a lamina to be stored and each arm being provided at its end portion remote from the spine with a projection into the groove spaced from the spine by a distance greater th