This curious creature resembles nothing so much as a large, fat, and somewhat oily maggot. It has no eyes and its other senses are only rudimentary. What material food it requres is absorbed directly through the skin, waste products being excreted in the same way. Sunworms are adapted to feed directly upon solar energy and their skins act as living photo-electric cells. In daylight, the creature lies partly in direct light and partly in shadow; a considerable charge of electricity is built up and this enables the creature to survive the hours of darkness.