Descriptions of two new Japanese hermit crabs (Decapoda: Paguridae: Diogenidae)

Two hermit crab species, Cancellus investigatoris Alcock and Paguristes setosus (H. Milne Edwards), have been reported on a number of occasions from Japanese waters. Neither Japanese taxon has been correctly identified, and both are now recognized as new species. The true Cancellus investigatoris appears to be restricted in its distribution to Sri Lanka, whereas the true Paguristes setosus is endemic to New Zealand. The Japanese species are described herein as Cancellus mayoae new species, and Paguristes miyakei new species. Sources of the earlier mistakes are discussed.