Anelida or Annelida: How To spell?

The word Anelida is misspelled against Annelida, a noun meaning "A division of the Articulata, having the body formed of numerous rings or annular segments, and without jointed legs. The principal subdivisions are the Chaetopoda, including the Oligochaeta or earthworms and Polychaeta or marine worms; and the Hirudinea or leeches. See Chaetopoda."