Scapulimancy (also spelled scapulomancy and scapulamancy, also termed omoplatoscopy or speal bone reading) is the practice of divination by use of scapulae or speal bones (shoulder blades). In the context of the oracle bones of ancient China, which chiefly utilized both scapulae and the plastrons of turtle, scapulimancy is sometimes used in a very broad sense to jointly refer to both scapulimancy and plastromancy (similar divination using plastrons). However, the term osteomancy might be more appropriate, referring to divination using bones. Many archaeological sites along the south coast and offlying islands of the Korean peninsula show that deer and pig scapulae were used in divination during the Korean Protohistoric Period, c. 300 BC – AD 300/400.