SOUTHAMPTON ART GALLERY - in the Legion Hi at Pond Lane off Monument Square, is unique in that z its proceeds will go to benefit the Hampton Animal Shf ter. The grand opening took place Friday, June 27, wil a preview of paintings by Enrique Senis-Oliver, and froi Saturday on the exhibit is open to the public. From Ji ly 5, the gallery will include paintings by LisaPolhemi and Alfred de Cabrol, with a preview Friday, July 4,6-p.m. The director of this new enterprise is Mrs, Fred rick C. Havemeyer,