Spectrophotometric data concerning three blue emission-line galaxies were obtained from image-tube spectrograms secured with the 84-inch reflector of the Kitt Peak National Observatory. Analysis of these data indicated a level of excitation similar to that of low- or moderate-excitation galactic H II regions. The relative emission-line intensities and the shapes of the nuclear continuua over the blue and near-ultraviolet wavelengths indicated that a population of hot stars is responsible for both the gas excitation and the blue continuua. (auth)