A: In the center, a boat with a steersman, while a figure plunges from the prow and a sea monster swims towards him (Jonah swallowed by the whale). To the left, a figure wearing a tunic stands with hands raised in prayer (Jonah praying). Behind the boat, a tree with a bird, below, a seated figure (Jonah) holding a staff.
B: No information.
Bonner, SMA on CBd-1515
Spier, Gems, 67, no. 418 (with earlier bibliography)
The Museum of Fine Arts, Boston website on CBd-1515