Alexander Calder's "Os et serpent" is a colorful lithograph that demonstrates the artist's characteristic biomorphic vocabulary, featuring organic forms that suggest both skeletal and reptilian elements. The composition employs bold, flat areas of color typical of Calder's printmaking practice, creating a dynamic interplay between the depicted bone and snake motifs. Created as a multiple, this work on wove paper exemplifies Calder's ability to translate his three-dimensional sculptural vocabulary into two-dimensional graphic form.