A total of 44 galaxies in the direction of the Virgo and Coma/Abell 1367 Cl
usters have been observed in the H I line at Nancay, 17 of which were clear
ly detected. These observations were obtained in order to complete the H I
database for a large, optically selected, sample of galaxies in these two r
egions. Surveys in these regions at other wavelengths (UV, visible, near-,
mid- and far-infrared, radio continuum) have been recently completed or are
still underway.