Miers, 1878
The carapace is transversely octangular in outline and its upper surface remarkably uneven, covered with vesiculous granules and pits. The protogastric, metagastric, cardiac and branchial regions are respectively convex and covered with vesiculous granules, but the interval bounding these regions is depressed and honey-combed by deep pits. The front is as broad as the posterior margin and is obtusely bilobed, distinctly projecting beyond the level of the eyestalks. The antero-lateral borders are granulated, the postero-lateral borders also granulated and have two lobulate projections. The orbits are sub-ovate and completely filled by the eyes. The antennal flagellum wanting. Previous authors admitted that this genus is characterized by having the orbits completely shut off from the antennulary fossettes, but by careful examination of the Japanese specimen of this species, I acertained that the orbits communicate with the antennulary fossettes as in genus Ebalia etc. Moreover the second segment of the antenna is independently movable, it being not fused with the suborbital lobe.
The external maxillipeds completely close the buccal cavern, the inner margin of the endopodite is straight; the merus is sharply triangular and is shorter than the ischium; the exopodite has the outer border arcuate.
Chelipeds are massive and symmetrical, the arm is laterally compressed and its upper edge strongly crested; the wrist and palm are closely covered with granules and pits, the upper border of the latter segment is crested and armed with three dentiform lobules. The immovable finger is short and regularly triangular in shape, the movable finger is slender and proximally constricted. The cutting edges are armed with five or six alternately set teeth. The ambulatory legs are compressed and eroded, with their anterior and posterior borders crested; the carpus and propodus have the upper surface also crested.
The abdomen of the female consists of seven distinct segments, each segment being granulated and eroded. (Sakai, 1937)
Type locality: Port Curtis, Australia.
Range: South Africa - Port Shepstone, Natal (Stebbing, 1920a); Mauritius (Bouvier, 1915b); Japan - Tosa Okinoshima (Sakai, 1937a), Tosa Bay and Yoron-jima (Sakai, 1976a); Australia - Shark Bay (Balss, 1935b), Port Curtis (Miers, 1878d); Kermadec Islands - Sunday Island and Meyer Island (Chilton, 1911); Hawaii.