'' P. armatus '' lives on a variety of substrates , being particularly abundant in sea pen beds , at depths of up to '' P. armatus '' was originally described ( under the name '' Bernhardus armatus '' ) from Puget Sound by James Dwight Dana . The holotype of '' P. armatus '' was lost in the Great Chicago Fire of 1871 , and has been replaced with a lectotype
Great Chicago Fire
Great Chicago Fire
Pagurus armatus