"American Seascapes: Artists at the Shore" -- A baker's dozen pieces, culled from the thousand or so works that make up the Norton's American collection. Seven are watercolors, with the remainder evenly split among oils, etchings, and gouaches. The American impressionist Childe Hassam, currently the subject of a major retrospective at New York's Metropolitan Museum of Art, puts a 20th-century spin on a 15th-century Botticelli masterpiece with an etching called The Birth of Venus, Montauk (1922). And Cape Split, Maine (1941), a watercolor by Hassam's contemporary John Marin, is a turbulent interpretation of a rugged coastline that was one of Marin's frequent inspirations. Also especially noteworthy are two gouache paintings on paper by Jane Peterson: By the Water, an undated study in atmosphere featuring palm trees and a few figures, and Florida Landscape, a circa-1930s image using colors so bright they take on an almost hallucinogenic intensity. Both were painted along a stretch of the Intracoastal Waterway in the Palm Beach area, and both capture distinctly South Floridian moods. (Through August 31 at the Norton Museum of Art, 1451 S. Olive Ave., West Palm Beach, 561-832-5196)