Integrated intensity map (upper left) and velocity field (bottom left) of the high resolution CO 2−1 emission (0.65′′ × 0.52′′), velocity field of the low resolution CO 2−1 emission (bottom right, 0.95′′ × 0.68′′) in NGC 4194, and an overlay of the high resolution ¹²CO 2−1 emission contours on top of an HST WFPC2 F606W filter image (top right). The noise level in the integrated intensity map is 1.3 Jy km s^-1. Contours for the integrated intensity map start at 2σ in steps of 2σ; the first negative contour at −2σ is shown as a dotted contour. The velocity range plotted in the velocity field is between 2400 km s^-1 and 2700 km s^-1; contours range from 2400 km s^-1 to 2640 km s^-1. The gray, gray-dashed, and white curves in the HST overlay and lower-resolution velocity field represent the locations of the most important dust lanes. The solid line box in the lower-resolution velocity field represents the field-of-view shown in the higher-resolution velocity field. North is up, east to the left. The position of the 1.4 GHz continuum peak is marked by a white cross (Beswick et al. 2005).