I. ISOLATION, IDENTIFICATION, AND STRUCTURE DETERMINATION OF COMPOUNDS ISOLATED FROM THE GORGONIANS, PTEROGORGIA ANCEPS AND PTEROGORGIA GUADALUPENSIS. II. INVESTIGATION OF A NOVEL METHOD FOR THE SYNTHESIS OFBUTYROLACTONES. III. INVESTIGATION OF THE THERMAL DECOMPOSITION OF 1, 1, 3, 3-TETRAOXO-2, 2-DIPHENYL-1, 3-DITHIANE.