(Balss, 1924)
Carapace typically pyriform, convex, covered thickly with short pubescence. The gastric region is armed with 10 or 12 tubercles, of which 4 or 5 are placed in the median line. Cardiac region conical and is mounted with a large tubercle, which is surrounded by 6 or 7 tubercles. On either side of this region is a series of 3 or 4 tubercles. The intestinal region low but the median tubercle is distinct. The hepatic region armed with about four tubercles, one of which is larger and placed on the lateral margin. The branchial region is armed with 16 or 17 tubercles, of which two are somewhat conical and placed on the lateral border near the lateral angle.
The pseudorostrum is nearly horizontal and narrowed anteriorly, the two spines are very obsolete and separated by the median sinus which is usually very shallow. The supraocular eave oblique, the preocular tooth not very acuminate; on the interorbital area are placed about 6 small tubercles. The postocular tooth very slightly cupped on the inner surface. The ridge of the pterygostomial region is armed with about 4 tubercles; there are also about 3 tubercles above the epimeral ridge. The basal segment of antenna distally subtruncate, its outer border has an indistinct tooth near the base; the following peduncular segments are foliaceous.
Chelipeds of male are very stout and resemble those of Pugettia; arm subprismatic but its ridges rounded; palm very broad and laterally compressed, upper and lower borders crested; fingers scarcely gaping. All these segments are naked in the male but thickly tomentose in the female excepting the fingers. Ambulatory legs are unarmed and thickly covered with velvet-like tomentum.
Abdomen in both sexes consists of seven distinct segments. (Sakai, 1938: 289)
Type locality: Zushi, Sagami Bay, Japan.
Range: Japan - Zushi (Balss, 1924b), Inubo-zaki and between Kinkazan and Sioya-zaki (Yokoya, 1933), Shimoda (Sakai, 1935a), between Ito and Hatsushima, Simoda and Ise Bay (Sakai, 1935), Sagami Bay, Shimoda, Ise Bay and Gobo (Sakai, 1938a), Sagami Bay (Sakai, 1965b), off Kinkazan, Onahama, Inubo-zaki, Sagami Bay, Izu Peninsula, Mikawa Bay and Kii Peninsula (Sakai, 1976a), Sendai, Manazuru, Sagami Bay, Shimoda, Mikawa Isshiki, Kii Minabe, and Tosa Bay (Muraoka, 1998); 30-150 m.