These two statuettes belong to a group of jointed figurines of those with articulated arms. They represent a seated nude girl and a youth. Their arms, now lost, were once attached with a string or wire that went through a hole piercing the shoulders.
Elderkin, Kate McK. 1930. "Jointed Dolls in Antiquity." American Journal of Archaeology, 34(4): p. 471, fig. 22.
McClees, Helen and Christine Alexander. 1933. The Daily Life of the Greeks and Romans: As Illustrated in the Classical Collections, 5th ed. p. 47, New York: The Metropolitan Museum of Art.