Third quadrant of the Milky Way. The dots mark all clouds above 5σ rms, using the same color-coding as Fig. 5. The observed region (225° < ℓ < 260°) is highlighted in light blue. Heliocentric distances d and galactocentric radii R are indicated as dash-dotted black and dotted gray circles, respectively. Positions of arms and local emission are indicated by solid lines in the same colors as in Fig. 5. The position of the Galactic supershell GSH 242-3+37 is indicated by the magenta ellipse. From the observed v_lsr we calculated the heliocentric distances for each cloud using the Brand & Blitz (1993) rotation curve to obtain Galactic positions.