Smarra

A monster with lion’s paws, wings, a human face and hair made of snakes sits on the chest of a sleeping man as a woman stands beside them.
The following quote is from the story illustrated above:

Smarra est le nom primitif du mauvais esprit auquel les anciens rapportaient le triste phénomène du cauchemar.

Smarra is the primitive name of the malevolent spirit to which the Ancients attributed the sad phenomenon that is nightmare.