A new species of land snail of the genus Mandarina (Gastropoda: Pulmonata) from Hahajima of the Bonin Islands, Western Pacific: a species that became extinct after 2000 yr B.P. Bulletin of the National Science Museum Series C (Geology & Paleontology), 25(3-4), December 1999: 121-127. 122 [Zoological Record Volume 137]