Summary(1) Partial extrusions of three hepatic hydatid cysts are reported from Tasmania, thus adding to the existing accounts of these events. Two were downward into the peritoneum and one upward into an expanded subphrenic space. These partial extrusions were all seen at operation.(2) Total extrusions known to have occurred elsewhere are briefly mentioned. A Tasmanian total extrusion is described in a case report. Total extrusion from this patient's liver was followed by intact transperitoneal migration into the recto‐vesical pouch. Operation happened to be done before rupture occurred and the cyst was delivered intact from the recto‐vesical pouch, an operation to which the writer has not found previous reference in English, though it cannot be said that anything like an exhaustive search has been made.(3) Because of the risk of rupture of the newly uncovered hydatid it is recommended that surgery should be resorted to as an emergency when intact extrusion is a possibility.(4) If the cyst is not seen where it was to be expected, then a very gentle exploration of the remainder of the opened serosal cavity is indicated, in case the cyst has migrated intact.(5) Finally, there is the possibility that intact extrusion may be found to be not so extremely uncommon a phenomenon if operation in a suspected case is done early, i.e. before rupture of the c