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Wide field CCD observations of three, less known, supernova remnants.Filamentary and diffuse emission is discovered from the supernova remnantG67.7+1.8. Emission can also be seen in the ROSAT All Sky Survey data whichindicate an extended hard X-ray source. The optical radiation from theG31.5-0.6 area shows weak sulfur emission and is probably not related to theremnant. Weak sulfur emission is also observed from W51C or G49.2-0.7. However,a small patch of emission in the south-east seems to emit strong sulfuremission. Results from long slit spectra are also presented.Comment: 16 pages, 4 png figures. Submitted revised version to A &

The supernova remnants G 67.7+1.8, G 31.5-0.6 and G 49.2-0.7