Note
Five species of the genus Acetabularia Lamouroux have been previously reported from Florida, A. crenulata Lamoureux, A. (Chalmasia) antillana (SolmsLaubach) Egerod, A. pusilla (Howe) Collins, A. (Acicularia] shenkii Mobius, and A. farlowii Sohns-Laubach (Taylor 1928, 1960). Acetahularia calyculus Quoy & Gaimard was collected by the senior author January 7, 1971 in Jupiter Sound (2W57.2'N, 80 004.4'W) and by the junior authors on April 5, 1976 in the Indian River north of Ft. Pierce Inlet (27°31.8'N, 80020.2.5'W).