(Dana, 1852)
Small species, the carapace relatively narrower and the antero-lateral borders extremely arched and longer than the postero-lateral. The dorsal surface is somewhat flattened but markedly vaulted down neat the fronto-orbital border. The lobules of carapace are clearly divided by very narrow grooves; 2M is only imperfectly subdivided in its anterior half. The outer surface of wrist is divided into about six lobules, that of the palm into about four. Carpus and propodus of the ambulatory legs are also divided into three to four lobules. (T. Sakai, 1939: 489)
Type locality: Samoa.
Range: Red Sea - (Kossmann, 1877, Klunzinger, 1913), Djeddah (de Man, 1880, Odhner, 1925); Gulf of Aden - Djibouti (Odhner, 1925); Zanzibar (Odhner, 1925); Mozambique - Delagoa Bay (Barnard, 1950); South Africa - Natal (Odhner, 1925); Seychelles - Coëtivy Islands (Rathbun, 1911), Praslin (Serène, 1984); Mauritius (Bouvier, 1915b, Odhner, 1925, Michel, 1964, Serène, 1984); Persian Gulf (Alcock, 1898); Chagos Archipelago (Rathbun, 1911); Sri Lanka (Alcock, 1898, Odhner, 1925); Andaman Islands (Alcock, 1898); Japan - Northern Daito-jima (Sakai, 1939), Amami-shoto, Okinawa and Ogasawara-shoto (Sakai, 1976a), Ishigaki-jima (Miyake, 1983); Taiwan - Lan-Yü (Chang et al., 1987); China - Paracel Islands (Chen & Lan, 1978, Dai & Yang, 1991); Philippines (Serène, 1984); Indonesia - Ternate and Salawati (Odhner, 1925); Caroline Islands - Truk (Odhner, 1925); Marshall Islands - Jaluit (Odhner, 1925); Gilbert Islands - Tamana and Tapeteuea (Odhner, 1925); Samoa (Dana, 1852, Odhner, 1925); Hawaiian Islands - Honolulu and French Frigate Shoal (Rathbun, 1906), Hilo, Hawaii (Stimpson, 1907), Honolulu (Odhner, 1925); Line Islands - Palmyra (Edmondson, 1923); Tahiti (Sendler, 1923, Odhner, 1925).