KINEMATICS AND MASS MODELING OF NGC-1068

We present the kinematics of the ionized gas over the inner 140 '' (10 kpc) from observations with the HIFI Fabry-Perot interferometer. Ther e is clear evidence for density wave streaming and bar-driven streamin g across the field, with bi-symmetric arms that penetrate to within 20 0 pc of the nucleus. CO maps show linear structures along (although sl ightly offset from) the bar consistent with a strong shock. Along the spiral arms which encircle the bar, the HII regions lie downstream of the CO gas in the rest frame of the bar, as do the dust lanes, only if the gas outruns the stellar bar. As a first step towards understandin g the details of the gas kinematics, and attempting to determine the m ass inflow rate towards the nucleus, we build a mass model for the cen tral disk constrained by near-infrared images. We plan to use this mod el as gravitational background potential for hydrodynamical simulation s of the gas response to the bar. Comparing these with the data presen ted should enable us to constrain various quantities such as pattern s peed, stellar mass-to-light ratio, central mass concentration, and gas fueling rate.