Distinct from the phylum Annelida

• Enigmatic small elongated wormlike terrestrial invertebrates of damp dark habitats in warm regions
• Resemble slugs with legs and are sometimes described as the missing link between arthropods and annelids

Wikipedia Word definitions in Wikipedia
Velvet worms are ecdysozoan invertebrate animals of the phylum Onychophora (from Greek, onyches , "claws"; and pherein , "to carry") with approximately 200 species. These elongate, obscurely segmented organisms have tiny eyes , antennae , many pairs of ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Onychophora \On`y*choph"o*ra\, n. pl. [NL., from Gr. ?, ?, a claw + ?.] (Zo["o]l.) Malacopoda.