Who are Mahood and Worm in the book, The Unnamable?

Mahood and Worm are not characters, but rather disjointed voices that presumably occur within the narrator's consciousness. Mahood is responsible for the narrator's stories, but, seeing as this is all on the word of the narrator, it is possible that Mahood is just a projection of his own consciousness. Worm, on the other hand, does not speak and is some kind of pre-ontological being. The narrator does suggest at one point, however, that Mahood and Worm might be the same voice.