New mass spectrographic masses are reported for some of the isotopes of gallium, germanium, arsenic, and selenium. These results are combined with previously reported atomic mass data in order to study atomic mass trends in the region [Formula: see text] and [Formula: see text]. The only pronounced mass effects which occur in this region are those associated with 28 and 50 nucleons. We have found no extra stability which can be associated with the filling of the f5/2, p3/2 and p1/2 subshells. A list of mass values used in this study is included.
