¹³CO (2–1) channel maps of the molecular line observations of B68. The radial velocities are indicated. The contours superimposed in the upper row and in the left panel of the lower row represent the LABOCA data. The contours in the lower right panel show the extinction map of Alves et al. (2001a). There is a general trend of the radial velocities being somewhat higher towards the eastern edge of B68. The highest velocities at v_LSR ≈ 4.1 ± 0.2 km s^-1 can be attributed to a point source that coincides with a local density peak at the tip of southeastern extension.