 The suprapedal gland opens between the head and foot immediately below the mouth; it forms a long flattish structure, much folded and lying on the floor of the body cavity.Its posterior end is slightly enlarged, and enclosed in a cavity in the foot, to which it has a muscular attachment.From the termination of the gland the usual tube or duct proceeds through the substance of the foot, but does not form a caudal mucous pit.