A fossil counterpart to ths extant marine noncalcareous green algal genus Caulerpa was recovered from Permian (Wolfcampian) marine sediments of the Palo Duro Basin, a part of the larger Permian Basin, West Texas. These fossil algal remains were recognized in core from the Department of Energy/Stone and Webster Engineering Corporation No. 1 Zeech well (Figure 1). The fossil form is described and compared to a morphologically similar extant species of Caulerpa. The geologic setting of the Palo Duro Basin is also briefly described as is the environment in which the modern algal genus Caulerpa lives.