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\section{Conclusion}  We undertake a search for galactic Galactic  bones in the region $|l|<30^\circ, |b|<1^\circ$ |b|<1^\circ$. We use large-scale GLIMPSE \textit{Spitzer} images of the Galactic plane to search for skinny, largely continuous infrared dark clouds elongated along predicted spiral arms on a 2D plane of the sky map. We visually identify ten bone candidates and confirm that they lie parallel to, and no more than twenty parsecs from, the physical Galactic midplane (assuming a flat Galaxy). We use radial velocity measurements derived from high and low density gas emission to establish velocity coherence and place the candidates in p-v space. Of the ten candidates, six are also contiguous in velocity space, lie within 10 km/s of the global log-fit to CO or HI for the Scutum-Centaurus and Norma-4kpc arms, and possess an aspect ratio of at least 50:1. The other candidates only fail the minimum aspect ratio criterion, and could be reclassified as we refine this criterion to account for projection effects.  In this paper, we use large-scale mid-infrared imaging of Our strongest candidate, BC\_18.88-0.09 runs remarkably parallel to  the physical  Galactic plane midplane and lies just 10-15 pc above that plane. It also exhibits remarkable velocity coherence and runs \textit{exactly} along the \citet{Dame_2011} fit  tosearch for bone candidates near locations where currently-claimed spiral arms should lie on  the sky (not exactly Scutum-Centaurus arm in p-v space. Finally, BC\_18.88-0.09 possesses an aspect ratio of  at b=0). least 140:1, suggesting that BC\_18.88-0.09 is the result of a larger global spiral potential rather than the localized collapse of a giant molecular cloud. Cumulative evidence suggests that BC\_18.88-0.09 and our other classified galactic bones mark the location of significant spiral features and can be used to pin down the accuracy of spiral arm models by a factor of one hundred.