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\section{Discussion}  Our initial search was intentionally limited: we specifically searched the Galaxy for the most prominent bones, near agreed-upon major spiral features, in a narrow longitude range (|$l$|\textless 30$^{\circ}$). Through a more comprehensive search, there are potentially hundreds of bone-like filaments discoverable in the Milky Way. If we can find enough bones, it should be possible to piece them together to delineate the major structural features of our Galaxy, using other relevant information as well (from maser measurements, 3D extinction mapping, and kinemeatic contstraints constraints  on boht both  gas and stars). Astronomers have been trying to accurately model the location of the spiral arms in position-velocity space for decades. A bones-based approach should be able to resolve some of the discrepancies amongst the many arm models shown in figure \ref{fig:skeleton}. The level of disagreement on arm locations is large enough that finding even just a handful of Galactic bones marking sections of the spines of spiral arms will tie arm fits down with high fidelity at particular positions in \textit{p-p-v} space. These "spinal" anchors will have especially large weights in statistical fits that seek to combine many measures of the Milky Way's skeletal structure. In the future, we plan to test and apply algorithms that "connect the dots" between markers of high density IRDC peaks, in a search for more skeletal features. Lenfestey, Fuller and Peretto (2015) (in prep) have recently undertaken such a study, utilizing an IRDC catalog of $\approx$ 11,000 high density peaks from \citet{Peretto_2009}. Lenfestey et al. have grouped these catalog objects into long filamentary structures, using a Minimum Spanning Tree (MST) algorithm, identifying 100 structures in the region $|l| < 65 ^{\circ}, |b|<1^{\circ}$. Of these structures, 22 are linear features similar to the Nessie cloud. We plan to investigate the Lenfestey filaments, as well as apply MST and related structure-finding procedures to additional surveys \citep[e.g. ATLASGAL or Hi-GAL,][]{Csengeri_2014,Molinari_2010}, applying our initial bone criteria to all candidates found, thereby producing a larger population of bones capable of pinning down galactic structure.