Hi Andrew,
          In answer to your question on Conch-L
          11/29/97 Rain Forest - Grenada
          Polydontes perplexa (Ferussac,1821)
          Found by chance on a concrete retaining wall after a rain storm by
me.
          Listed in Abbott's Compendium of Land Shells - Page 139 as extinct
          A pair, now living since date of find in a glass fish tank in my
home.
 However they are not breeding as yet
                                                      Mel S.