The Collaborative International Dictionary of English v.0.48:

Chelifer \Chel"i*fer\, n. [Gr. chhlh` claw + -fer.] (Zool.)
   See Book scorpion, under Book.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Chelifer
    n 1: a genus of Chelonethida [syn: Chelifer, genus Chelifer]