Specific heat measurements have been made under pressure on a 5% ~He-4He solution between 10 and 93 inK, yielding values for the specific heat mass, m*, of 2.45m3, 2.74 m3, and 3.07m3 at pressures of O, 10, and 20 atm, respectively; corresponding values of the zero-concentration effective mass mo are 2.38 m 3, 2.64 m 3, and 2.90 m 3 for the above pressures. Measurements were also made on a 3% solution. Above 35 inK, all the measurements show deviations from a free-Fermi-gas behavior.