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We present VLA \ion{H}{1} and optical spectra of the peculiar galaxy Arp~10.Originally believed to be an example of a classical colliding ring galaxy withmultiple rings, the new observations show a large disturbed neutral hydrogendisk extending 2.7 times the radius of the bright optical ring. We also presentevidence for optical shells or ripples in the outer isophotes of the galaxyreminiscent of the ripples seen in some early type systems. The smallelliptical originally believed to be the companion is shown to be a backgroundgalaxy. The \ion{H}{1} disk consists of two main parts: a very irregular outerstructure, and a more regular inner disk associated with the main brightoptical ring. In both cases, the \ion{H}{1} structures do not exactly trace theoptical morphology. In the outer parts, the \ion{H}{1} distribution does notcorrelate well with the optical ripples. Even the inner \ion{H}{1} disk doesnot correspond well morphologically nor kinematically to the optical rings.These peculiarities lead us to believe that the potential in which the\ion{H}{1} disk resides is significantly out of equilibrium --- a situationwhich would inherently produce rings of star formation. We suggest that Arp~10is the result of the intermediate stage of a merger between a large \ion{H}{1}rich disk and a gas-poor disk system. As such, it may represent an example of aclass of mergers which lies intermediate between the ``ripple and shell''accretion systems and the head-on collisional ring galaxies.

The Neutral Hydrogen Disk of ARP 10 (=VV 362): A Nonequilibrium Disk Associated with a Galaxy with Rings and Ripples