The observed auroral spectral feature at ~2150 ¿ may consist partially of spin forbidden transitions in singly ionized atomic nitrogen, N II. These transitions are analogous to the 1356 ¿ feature O I in that they represent transitions from the lowest lying quintet term to the ground state 3P. Prior consideration of these transitions may have been hampered both by the uncertainity of a precise wavelngth value for the observed auroral spectral feature (due to its evidently complex nature) and by the relatively recent determination of the wavelengths of intercombination lines joining the quintet levels of N II to the more abundant triplet and singlet levels.