Classification spectra of the 42 SNe IIn included in our study, each showing the Hα narrow or intermediate-width emission characteristic of SNe IIn. Details of the spectra are given in Table 3. In some spectra, telluric B-band absorption (or residual, incompletely removed absorption) is visible at 6860 Å in the observed frame of reference. Spectra of PTF10weh and PTF12cxj were presented by Ofek et al. (2014a), spectra of PTF10gvf by Khazov et al. (2016), of PTF10tel by Ofek et al. (2013) and Khazov et al. (2016), and of PTF12glz by Soumagnac et al. (2019).