Ten new members of the class of compact extragalactic H II regions or blue compact dwarf galaxies (BCG) have been discovered in the directon of the Virgo cluster using objectiveprism plates from the UK Schmide Telescope. Follow-up spectroscopy of fieve of the new galaxies shows them to be low-luminosity systems (-14≥MV≥-19) with strong narrow lines of large equivalen width. Velocities of three of the galaxies show them to be in the Virogo cluster. Form plots of line rations which separate objects according to excttation mechanis, there is no eveidence for power-law excitation or broad line components in any of the galaxies. Selection of BCGs form UK Schmide plates is particularly well suited to the discovery of ultra-low-luminosity galaxies where the intense star formation is concentrated in one region.