In East Hampton, Art and Craft in Motion.

The line between art and craft is relaxed at three exhibitions mounted this season at LongHouse Reserve in East Hampton, a 16-acre sculpture garden and preserve founded by the textile designer Jack Lenor Larsen. Mr. Larsen's own creations have included, among others, curtains for Lever House and seat fabric for Braniff International Airways. On the craft -- that is, specifically handmade -- end of the spectrum at LongHouse is a collection of African ceramics assembled by the Chicago art dealer Douglas Dawson, who specializes in ancient and historic non-Western art. The exhibition includes more than 30 vessels made over the last 2,500 years by anonymous craftsmen and women. There are beer storage containers from Tanzania and South Africa; a churn from Morocco; a long, tall flask from Mali; and a ''double vessel'' from Cameroon that rests on two bulbous forms that look strikingly like buttocks. [ABSTRACT FROM PUBLISHER]