Detailed measurements of the emission4ine spectrum of the head of Comet 1957d were made on Palomar coude spectra. Because of the strong continuous spectrum, new weak lines or bands could not be expected. The C2 bands and the NH2 bands produced by resonance fluorescence are nearly completely resolved The Na I lines are asymmetric with respect to the nucleus. No significant velocity shifts are found for NH2. Wavelengths and details of the identifications can be found in Table 2; a few strong unidentified lines are given in Table 4. Figures 14 provide an atlas of the visual region of the spectrum. From a discussion of the absence of atomic lines other than Na I, we conclude that Ca I and Al I could be expected to appear in some comets as well as Si I and Mg I in the rocket ultraviolet. A study of the visual observations of the spectrum of Comet 1882 II suggests that one multiplet of Fe I did appear in this great comet, which had q 0008.