Abstract
A new species of calanoid copepod, Euchirella tanseii n. sp., is described from the bottom living crustacean collections made by the RV Tansei Maru in Sagami Bay. A female of the specimen was obtained in bottom net hauls taken on a sandy and gravelly substrate at a depth of 100m. The species closely resembles Euchirella venusta GIESBRECHT and E. pulchra (LUBBOCK), but can be distinguished by shape of the genital segment and the number of setae on 2nd segment of endopodite of 2nd antenna. The comparison of systematical characters with these species is attempted.
