A papier-mâché crab holding bronze-cast crackers. Meticulously detailed aquatint etchings of oyster shells. These are a few of the items featured in West Marin’s newest tool-shed-turned-art-gallery in Marshall, the Lonely Abalone. The space is located across the street from Hog Island Oyster Company and the gallerists are a group of California College of the Arts graduates who are chasing childhood nostalgia on Tomales Bay, driven by what they call a re-energized arts movement in West…