A prediction of galaxy counts at 2000 Angstrom and m(2000) - B color d
istributions is elaborated from published spectral energy distribution
s and evolution models of galaxies. The comparison of the predictions
to the observations at 2000 Angstrom is used to derive constraints on
the local density of star-forming galaxies and their recent evolution.
The data indicate a larger contribution of moderately blue ultraviole
t-emitting galaxies than usually assumed in model counts at visible wa
velengths. This discrepancy can reflect an underestimate of the local
density of the actively star-forming galaxies, as well as an underesti
mate of the spectrophotometric and maybe numeric evolution of these ob
jects. Models which call upon a large contribution of very blue galaxi
es to explain the well known number excess in galaxy counts near B = 1
8, produce blue tails in the m(2000) - B color distributions, which ar
e not observed in the data.