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Southwest Florida Shells with Emphasis on Sanibel & Captiva

By José H. Leal

Family Cerithiidae

Bittiolum varium

(Pfeiffer, 1840)

Grass Cerith

Shell size to 4 mm; shell with six to eight rounded whorls. Sculpture of spiral lines and weak axial ribs which intersect forming raised nodules. Body whorl usually with varix. Inner lip squarish. Color extremely variable, usually light- to dark-brown, sometimes with darker mottlings or specklings. Common in seagrass beds.