The fine structure of the He ii 3s, p, d-4s, p, d, f line complex (σ=21 335 K, λ=4686 Å) as observed in a hollow cathode cooled in liquid helium has been studied with a photoelectric double Fabry-Perot spectrometer. The traces show excellent resolution. Among the component lines: (1) The relative intensities tend, with increasing pressure in the discharge region, toward the calculated statistical intensities, and with decreasing pressure, not toward Bethe's dynamical intensities but in each case toward a dynamical intensity determined by the lifetime and rate of excitation of the initial state. (2) The measured relative positions are in good agreement with those calculated from quantum electrodynamics; small apparent discrepancies are believed to be associated with the excitation conditions. (3) The widths of the lines are appreciably greater than the widths of the He i lines at σ=21 218 K, the derived widths being 74 and 44 mK, respectively. (4) The positions are significantly shifted (~4 mK) due to a drift of the He+ ions toward the cathode, and there is evidence that the lines of the neutral atoms are shifted (~1 mK) due to a motion of the emitters toward the anode.