(A. Milne Edwards, 1867)
The carapace not very convex and the regions indistinctly defined. The front well produced beyond the orbital border, divided into two lobes by an obscure median notch. The supraorbital angle is not produced into a tooth but is clearly separated from the frontal lobe by a shallow sinus.
The antero-lateral borders are extremely arched and prolonged far backward and are sharply crested, divided into four lobes by three completely closed fissures, each lobe having an obscure tooth-like apex; the postero-lateral borders are very slightly concave. The external orbital tooth is very small; the infraorbital border bears two obscure teeth, one immediately below the external orbital tooth and the other at inner angle.
Arm is not very thick, wrist is stout and irregular in shape and has two obtuse teeth at inner angle; the palm distally broadened and dorsally crenulate, the upper half of the outer surface is faintly rugose but the inner and under surfaces smooth; Ambulatory legs are not markedly crested. (Sakai, 1939)
Type locality: New Caledonia.
Range: Red Sea (Nobili, 1906); Aden (Guinot, 1968a); Kenya (Serène, 1984); Zanzibar (Lenz, 1905); Madagascar - Tany Kely (Serène, 1984); Sri Lanka; Japan - Gobo and Nagasaki (Sakai, 1939), Sagami Bay (Sakai, 1965b), Sagami Bay, Kii Nagashima, Kii Minabe, and Nagasaki (Sakai, 1976a); Taiwan; Gulf of Thailand; Arafura Sea; Torres Strait; Australia - Moreton Bay (Campbell & Stephenson, 1970); New Caledonia (A. Milne Edwards, 1867); littoral to 23 m.