Study sheet with drawing examples: heads, animals and fruits

Twentieth print from a series of drawing models of unknown extent. Study sheet with fruit, animals, and heads. In the center, a fig on its leaf, below it a sliced fig. On either side, animals: a rhinoceros beetle, caterpillar, lizard, and sea turtle. Below them, two heads. Upper left, a Madonna with Child (after Raphael). Upper right, a bird's-foot trefoil, next to it a giraffe. In the center, an insect and a peacock butterfly.