Revision of Pylopagurus and Tomopagurus (Crustacea: Decapoda: Paguridae), with descriptions of new genera and species. Part VI. Pylopagurus A. Milne-Edwards & Bouvier, 1891, Haigia McLaughlin, 1981, and Pylopaguridium, a new genus. Proceedings of the Biological Society of Washington, 114(2), 25 May 2001: 444-483. 472 [Zoological Record Volume 137]