Studies on West Indian marine molluscs 55. Marine gastropods from the ABC islands and other localities 11. The genera Pachybathron and Persicula with the description of a new species of Persicula from French Guyana (Gastropoda: Cystiscidae). Miscellanea Malacologica, 2(2), 28 December 2006: 25-39. 30 [Zoological Record Volume 143]