IC 3913: This late-type spiral is one of the three galaxies
detected in the southwest of Coma, lying at 17" (0.34 Mpc) southwest of
NGC 4839. IC 3913 shows a normal H I content (Def_HI_ = 0.04) and a
regular H I distribution. Its most external H I contour displays a clear
extension to the east, what accounts for the asymmetry observed by
Gavazzi (1989) from single dish observations.