The file is part "ad" of a set of 7 files (aa-af) corresponding to a compressed archive (.tar.gz) that has been split (using split). These will need to be concatenated (using cat) to restore the original archive (see http://wiki.datadryad.org/Large_File_Transfer). In the archive, each directory represents a timepoint, and each timepoint contains directories with images and a mesh corresponding to RIL lines from the BTx623 x IS3620C population. Each RIL has three replicates, and the suffix indicates the replicate number
