The Collaborative International Dictionary
Protracheata
Protracheata \Pro*tra`che*a"ta\, n. pl. [NL. See Pro-, and Trachea.] (Zo["o]l.) Same as Malacopoda.
Protracheata
Malacopoda \Mal`a*cop"o*da\, prop. n. pl. [NL., fr. Gr. malako`s soft + -poda.] (Zo["o]l.) A class of air-breathing Arthropoda; -- called also Protracheata, and Onychophora.
Note: They somewhat resemble myriapods, and have from seventeen to thirty-three pairs of short, imperfectly jointed legs, two pairs of simple jaws, and a pair of antenn[ae]. The tranche[ae] are connected with numerous spiracles scattered over the surface of the body. Peripatus is the only known genus. See Peripatus.