/usr/include/libMems-1.6/libMems/ is in libmems-1.6-dev 1.6.0+4725-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libMems-1.6/libMems/AbstractGappedAlignment.h
/usr/include/libMems-1.6/libMems/AbstractMatch.h
/usr/include/libMems-1.6/libMems/Aligner.h
/usr/include/libMems-1.6/libMems/Backbone.h
/usr/include/libMems-1.6/libMems/CompactGappedAlignment.h
/usr/include/libMems-1.6/libMems/DNAFileSML.h
/usr/include/libMems-1.6/libMems/DNAMemorySML.h
/usr/include/libMems-1.6/libMems/DenseAbstractMatch.h
/usr/include/libMems-1.6/libMems/DistanceMatrix.h
/usr/include/libMems-1.6/libMems/FileSML.h
/usr/include/libMems-1.6/libMems/Files.h
/usr/include/libMems-1.6/libMems/GappedAligner.h
/usr/include/libMems-1.6/libMems/GappedAlignment.h
/usr/include/libMems-1.6/libMems/GreedyBreakpointElimination.h
/usr/include/libMems-1.6/libMems/HomologyHMM/
/usr/include/libMems-1.6/libMems/HomologyHMM/algebras.h
/usr/include/libMems-1.6/libMems/HomologyHMM/dptables.h
/usr/include/libMems-1.6/libMems/HomologyHMM/homology.h
/usr/include/libMems-1.6/libMems/HomologyHMM/parameters.h
/usr/include/libMems-1.6/libMems/HybridAbstractMatch.h
/usr/include/libMems-1.6/libMems/Interval.h
/usr/include/libMems-1.6/libMems/IntervalList.h
/usr/include/libMems-1.6/libMems/Islands.h
/usr/include/libMems-1.6/libMems/LCB.h
/usr/include/libMems-1.6/libMems/MaskedMemHash.h
/usr/include/libMems-1.6/libMems/Match.h
/usr/include/libMems-1.6/libMems/MatchFinder.h
/usr/include/libMems-1.6/libMems/MatchHashEntry.h
/usr/include/libMems-1.6/libMems/MatchList.h
/usr/include/libMems-1.6/libMems/MatchProjectionAdapter.h
/usr/include/libMems-1.6/libMems/Matrix.h
/usr/include/libMems-1.6/libMems/MemHash.h
/usr/include/libMems-1.6/libMems/Memory.h
/usr/include/libMems-1.6/libMems/MemorySML.h
/usr/include/libMems-1.6/libMems/MuscleInterface.h
/usr/include/libMems-1.6/libMems/NumericMatrix.h
/usr/include/libMems-1.6/libMems/PairwiseMatchAdapter.h
/usr/include/libMems-1.6/libMems/PairwiseMatchFinder.h
/usr/include/libMems-1.6/libMems/PhyloTree.h
/usr/include/libMems-1.6/libMems/ProgressiveAligner.h
/usr/include/libMems-1.6/libMems/RepeatHash.h
/usr/include/libMems-1.6/libMems/RepeatMatch.h
/usr/include/libMems-1.6/libMems/RepeatMatchList.h
/usr/include/libMems-1.6/libMems/Scoring.h
/usr/include/libMems-1.6/libMems/SeedMasks.h
/usr/include/libMems-1.6/libMems/SeedOccurrenceList.h
/usr/include/libMems-1.6/libMems/SlotAllocator.h
/usr/include/libMems-1.6/libMems/SortedMerList.h
/usr/include/libMems-1.6/libMems/SparseAbstractMatch.h
/usr/include/libMems-1.6/libMems/SubstitutionMatrix.h
/usr/include/libMems-1.6/libMems/SuperInterval.h
/usr/include/libMems-1.6/libMems/TreeUtilities.h
/usr/include/libMems-1.6/libMems/UngappedLocalAlignment.h
/usr/include/libMems-1.6/libMems/configuration.h
/usr/include/libMems-1.6/libMems/dmSML/
/usr/include/libMems-1.6/libMems/dmSML/aPOSIXaio.h
/usr/include/libMems-1.6/libMems/dmSML/alibc.h
/usr/include/libMems-1.6/libMems/dmSML/alinuxaio.h
/usr/include/libMems-1.6/libMems/dmSML/asyncio.h
/usr/include/libMems-1.6/libMems/dmSML/awin32aio.h
/usr/include/libMems-1.6/libMems/dmSML/buffer.h
/usr/include/libMems-1.6/libMems/dmSML/dmsort.h
/usr/include/libMems-1.6/libMems/dmSML/sml.h
/usr/include/libMems-1.6/libMems/dmSML/sorting.h
/usr/include/libMems-1.6/libMems/dmSML/timing.h
/usr/include/libMems-1.6/libMems/dmSML/util.h
/usr/include/libMems-1.6/libMems/gnAlignedSequences.h
/usr/include/libMems-1.6/libMems/gnRAWSequence.h
/usr/include/libMems-1.6/libMems/twister.h