A paper on the Ocypodid crabs of the Netherlands Antilles, which is now in preparation, was held up by the fact that one of the species of Uca, commonly found on practically all of the islands, proved to need a new name, which I expected to be introduced by Dr. Jocelyn Crane in her coming monograph of the genus Uca. However, Dr. Crane has now decided to refrain from giving a new name to this form. As several authors dealing with the species should like to have a valid name for it, the new name is now proposed here. Uca burgersi new species Gelasimus affinis Streets, 1872: 131 (not Gelasimus affinis Guérin, 1829). Gelasimus vocator p.p. Kingsley, 1880: 147. Uca mordax p.p. Rathbun, 1918: 391 (not text-fig. 166, nor pl. 134 fig. 3, 4). Uca affinis Holthuis, 1959: 76; Holthuis, 1959a: 265, 266. Holotype. — Plantage Knip, Westpunt, Curaçao, Netherlands Antilles; 15 December 1956; leg. А. С. J. Burgers and L. B. Holthuis (L. B. Holthuis no. 1023). — 1 ♂, carapace breadth 18 mm, carapace length 12 mm. Preserved in the collection of the Rijksmuseum van Natuurlijke Historie, Leiden, under Reg. No. Crust. D. 23012. Additional material. — Numerous paratypes, among which the syntypes of Gelasimus affinis Streets, were examined. They originate from Key Biscayne, S. Florida (U.S.A.), the province of Veracruz (Mexico), and the West Indian islands of St. Thomas, St. Croix, Anguilla, St. Martin, Nevis, Barbuda, Antigua, Tobago, Trinidad, the Islas de Aves, Bonaire, Curaçao and Aruba. A more extensive enumeration of the material will be published later. I am most indebted to various persons for providing me with this