Dryades: The Dryades were the Nymphs of the Forest, or wood nymphs. Dryades were immortal, unlike other types, like the Hamadryades, who lived in oak trees and would die when the tree they lived in died. They were the hunting companions of Artemis.
A Nymph and Cupid, but is usually known as Snake in the Grass
Sir Joshua Reynolds
"A girl seated on a bank is sporting with Cupid, who has seized both ends of her girdle and is untying it; in the grass by her side, the head of a snake; in background, a red curtain. Exhibited at Royal Academy 1785, under title of Venus. Painted for Lord Carysfort, who paid 200 guineas for it. Subsequently called Love unloosing the Zone of Beauty, and later, Snake in the Grass, the snake possibly being intended as an emblem of Cupid."
(source: Cyclopedia of Painters and Paintings, Volume 4)
I guess what this is saying that the nymph is often referred to as Venus. However, I don't think that the snake is an emblem of Cupid. It's probably a symbolic for temptation. Sir Joshua Reynolds was a English painter and Christianity is the main religion in England. It was first introduced by that Romans, which is where the names Cupid and Venus come from. (Eros and Aphrodite are the Greek names.) Plus, you guys all know the Adam and Eve story right? (By the way, 200 guineas is only 40 cents in USD. I sure wish beautiful paintings like these were this cheap. That is SO not going to happen.) Okay then... moving on!
Sleeping Nymph and Shepherd
Jan Gerritsz van Bronckhorst
"This painting is an almost pornographic portrayal of a young man spying on a naked woman with his thumb extended between his index and middle fingers in a gesture that signifies copulation. The nude is portrayed on a beautifully draped cloth against a shadowy background of rocks and trees. It was apparently not the artist's intention to illustrate a theme along the lines of Venus and Adonis or Jupiter and Antiope, for instance, but simply to paint a picture with no specific subject in mind."
(source: Web Gallery of Art)