Abstract
Stomatopod crustaceans of the genus Harpiosqulla in the family Squillidae were studied on the basis of 141 specimens collected by bottom trawlers from Tosa Bay. The following four species were recognized: H. harpax( de Haan, 1844), H. ammamdalei(Kemp, 1911), H. melanoura Manning, 1968, and H. sinensis Liu et Wamg, 1998. In the Japanese fauna, H. melanoura has been represented only by two specimens, the first from Kochi Prefecture and the second from Osaka Bay, but 12 additional specimens were collected during this study. Harpiosquilla sinensis frequently collected at Saga fish market (33°04′18″N，133°06′55″E）is reported for the first time in Japanese waters.
