Epitaxially sensitized ultrathin tabular grain emulsions containing stabilizing addenda

An emulsion comprising tabular silver halide grains, sensitizing dye(s) and silver salt epitaxial deposits, and addenda that include

• a mercaptotetrazole and a tetraazaindene wherein said tabular silver halide grains comprise grains
• (a) having {111} major faces,
• (b) containing greater than 70 mole percent bromide and at least 0.25 mole percent iodide, based on silver,
• (c) accounting for greater than 90 percent of total grain projected area,
• (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m,
• (e) exhibiting an average thickness of less than 0.07 .mu.m, and
• (f) having latent image forming chemical sensitization sites on the surfaces of the tabular grains,
• and a spectral sensitizing dye adsorbed to at least the major faces of the tabular grains, wherein the surface chemical sensitization sites include at least one silver salt epitaxially located on and confined to laterally displaced regions of said tabular grains.