Sea Form (Atlantic)
Sea Form (Atlantic) (BH 362) is a 1964 bronze sculpture by English artist Barbara Hepworth. It measures . The sculpture comprises a single large curved free-standing form, similar to a shield, with contrasting rough and smooth surfaces with brown or green patination, and five pierced apertures that resemble holes in a sea shell. Like Hepworth's "Single Form" (1961), it was based on Neolithic standing stones at Chûn Castle hillfort site in West Cornwall. It was part of a series of sculptures that took inspiration from the cliffs and caves on the coastline near Porthcurno on the  Penwith peninsula. Other works in the series include "Curved Form (Bryher)" (1961), "Oval Form (Trezion)" (1961–63) and "Rock Form (Porthcurno)" (1964). It was cast at the Morris Singer foundry in London in 1964, in an edition of 6+1 (six for sale, and one artist's copy). A cast was exhibited at the Battersea Park sculpture exhibition in 1966. Three of the casts are now on display in public collections, and three held by private collectors.