Reflectance spectra of large, low-albedo C-complex asteroids in Table 2 normalized at 550 nm from SMASSII (Bus & Binzel 2002; DeMeo et al. 2009) and S³OS² (Lazzaro et al. 2004). Numbers in the parenthesis in each panel indicate phase angles at the time of observations. Weak features near 900 nm appear in the spectra taken at different times with different instruments at edge wavelengths where detectors are less sensitive. Discontinuities shown in several SMASSII spectra near 800 nm are caused by the concatenation of different datasets (DeMeo et al. 2009).