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We construct near-infrared to visible broad band NICMOS/WFPC color maps for 4early-type Seyfert galaxies with S-shaped or one-sided ionization cones. Wefind that dust lanes are near or connected to many of the features seen in the[OIII] and H$\alpha$+[NII] line emission maps. This suggests that much of thestructure of line emission in these ionization cones is determined by thedistribution of ambient dense galactic gas. Spiral arms, dust lanes caused bybars, or gaseous warps provide dense gas which when illuminated by a conicalbeam of ultraviolet photons can result in the complicated line emissionmorphologies observed.Comment: accepted by Ap

Dust Lanes Causing Structure in the Extended Narrow‐Line Region of Early‐Type Seyfert Galaxies