Galactic longitude versus radial velocity. The dots mark all clouds found above 5σ rms between 260° ≤ ℓ ≤ 225°, with the peak antenna temperature color-coded. Background image: CO(1–0) emission from Dame et al. (2001). Dashed yellow, magenta, and green lines: peaks at 9, 11, and 14.0 kpc, respectively, as found in Fig. 7. The spiral arms and the position of the local emission as determined from H I emission are marked by the colored solid lines. Cyan: local emission; green: Perseus arm; red: outer arm. The solid magenta ellipse marks the rim of the Galactic supershell GSH 242-3+77. Gray dashed lines: galactocentric radii at 10 and 15 kpc. The green stars mark the positions of the three sources from the Methanol Multibeam (MMB; Green et al. 2012) survey found in the region.