Two new species of Mitrella Risso, 1826 (Gastropoda, Columbellidae) from West Atlantic

Two new species of Mitrella Risso, 1826 are described from the west Atlantic Ocean. Mitrella cabofrioensis sp. nov. is known only from the southeastern coast of Brazil. This species is diagnosed by its pattern of white flamules over a reddish brown background, and a domelike, paucispiral protoconch, with 2 whorls. Mitrella antares sp. nov. is know from the Bahamas, Cozumel island, and Brazilian coast. This species is diagnosed by its large, globose, multispiral protoconch, with 3 whorls, and by two strong denticles on the columella