The discovery of six-lunuled specimens of Mellita quinquiesperforata suggests that the placing of 5-lunuled and 6-lunuled sand dollars of the Atlantic coast of the United States into separate genera is no longer justified. It is proposed that the 6-lunuled sand dollar, Leodia
sexiesperforata, be returned to the genus Mellita, thus restoring the old combination Mellita sexiesperforata.
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