_Carpophaga oceanica_ Finsch, Ibis, 1880, p. 331 (Arno); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 52 (Arno); _idem_, Ibis, 1893, p. 211 (Marshalls). _Globicera oceanica oceanica_ Momiyama (part), Birds Micronesia, 1922, p. 5 (Arno); Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 55 (Arno). _Globicera oceanica ratakensis_ Hand-list Japanese Birds, rev., 1932, p. 190 (Arhno, Wotze); Mathews, Ibis, 1933, p. 87 (Aruno, Wozzie). _Ducala oceanica ratakensis_ Peters, Check-list Birds World, 3, 1937, p. 44 (Arno, Wotje); Hand-list Japanese Birds, 3d ed., 1942, p. 212 (Arhno, Wotze); Amadon, Amer. Mus. Novit., no. 1237, 1943, p. 12 (Arno, Wotje); Mayr. Birds Southwest Pacific, 1945, p. 289 (Arno, Wotje). _Geographic range._--Micronesia: Marshall Islands (Radak Chain)--Wotje, Arhno. _Characters._--Takatsukasa and Yamashina (1932:221) describe this subspecies as follows, "This form differs from all other forms of _Globicera oceanica_ by its smaller size, more bronze-sheen on the back, more vinaceous grey on the breast and duller brown on the abdomen." On examining two specimens from Arno in the collection of the Museum of Comparative Zoölogy, Amadon (1943:12) writes that he finds no distinguishing color characters between _D. o. oceanica_ and _D. o. ratakensis_. He also questions whether there is any difference in size between the two populations. _Measurements._--Measurements are listed in table 27. _Remarks._--Chamisso (1821), the naturalist on board the ship "Rurick," was the first person to write of the pigeon in the Radak Chain of the Marshall Islands. The ship visited this area in 1817. Finsch (1880b) published an account of the bird when he visited the area about 1880. Takatsukasa and Yamashina (1932:221) described this bird as new on the basis of an examination of nine skins taken at Arhno and Wotje. _Evolutionary history of Ducula oceanica in Micronesia._--The distribution and evolutionary history of _Ducula oceanica_ have been treated by Mayr (1940) and Amadon (1943). These authors place _D. oceanica_ within a superspecies containing _D. pacifica_ (Melanesia to Samoa and Cook Islands), _D. aurorea_ (Society Islands), _D. galeata_ (Marquesas Islands), and possibly other species in Papua and Malaysia. According to Mayr (1942b:fig. 7), _D. pacifica_ is the species which is ancestral to other species of pigeons in Oceania. Apparently _D. oceanica_ was derived from this ancestral stock and reached Micronesia via the Ellice and Gilbert islands. Records of _Ducula_ were obtained in the Gilbert Islands in the days of exploration; Amadon (1943:11) tentatively refers these to _D. o. oceanica_.