Deep HST WFPC2 images have revealed a population of very narrow blue g
alaxies, which Cowie et al. have interpreted as being a new morphologi
cal class of intrinsically linear star forming galaxies at z = 0.5-3.
We show that the same population exists in large numbers at low redshi
fts (z approximate to 0.03) and are actually the edge-on manifestation
of low surface brightness disk galaxies.