Per the 1886 Gazetteer of the Bombay Presidency:
His features and his body are like those of a man except that his hands and feet are turned back. His eyes are a tawny green, his hair stands on end, and he holds a cane in his right and a conch shell in his left hand. Vetál lives on air. When he goes his rounds he is dressed in green and either sits in a litter or rides a horse. Some of his spirits walk before and others walk after him, holding lighted torches and shouting.