/usr/include/dolfin/mesh/ is in libdolfin-dev 2017.2.0.post0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/dolfin/mesh/BoundaryComputation.h
/usr/include/dolfin/mesh/BoundaryMesh.h
/usr/include/dolfin/mesh/Cell.h
/usr/include/dolfin/mesh/CellType.h
/usr/include/dolfin/mesh/DistributedMeshTools.h
/usr/include/dolfin/mesh/DomainBoundary.h
/usr/include/dolfin/mesh/DynamicMeshEditor.h
/usr/include/dolfin/mesh/Edge.h
/usr/include/dolfin/mesh/Face.h
/usr/include/dolfin/mesh/Facet.h
/usr/include/dolfin/mesh/FacetCell.h
/usr/include/dolfin/mesh/HexahedronCell.h
/usr/include/dolfin/mesh/IntervalCell.h
/usr/include/dolfin/mesh/LocalMeshData.h
/usr/include/dolfin/mesh/LocalMeshValueCollection.h
/usr/include/dolfin/mesh/Mesh.h
/usr/include/dolfin/mesh/MeshColoring.h
/usr/include/dolfin/mesh/MeshConnectivity.h
/usr/include/dolfin/mesh/MeshData.h
/usr/include/dolfin/mesh/MeshDomains.h
/usr/include/dolfin/mesh/MeshEditor.h
/usr/include/dolfin/mesh/MeshEntity.h
/usr/include/dolfin/mesh/MeshEntityIterator.h
/usr/include/dolfin/mesh/MeshEntityIteratorBase.h
/usr/include/dolfin/mesh/MeshFunction.h
/usr/include/dolfin/mesh/MeshGeometry.h
/usr/include/dolfin/mesh/MeshHierarchy.h
/usr/include/dolfin/mesh/MeshOrdering.h
/usr/include/dolfin/mesh/MeshPartitioning.h
/usr/include/dolfin/mesh/MeshQuality.h
/usr/include/dolfin/mesh/MeshRelation.h
/usr/include/dolfin/mesh/MeshRenumbering.h
/usr/include/dolfin/mesh/MeshSmoothing.h
/usr/include/dolfin/mesh/MeshTopology.h
/usr/include/dolfin/mesh/MeshTransformation.h
/usr/include/dolfin/mesh/MeshValueCollection.h
/usr/include/dolfin/mesh/MultiMesh.h
/usr/include/dolfin/mesh/PeriodicBoundaryComputation.h
/usr/include/dolfin/mesh/PointCell.h
/usr/include/dolfin/mesh/QuadrilateralCell.h
/usr/include/dolfin/mesh/SubDomain.h
/usr/include/dolfin/mesh/SubMesh.h
/usr/include/dolfin/mesh/SubsetIterator.h
/usr/include/dolfin/mesh/TetrahedronCell.h
/usr/include/dolfin/mesh/TopologyComputation.h
/usr/include/dolfin/mesh/TriangleCell.h
/usr/include/dolfin/mesh/Vertex.h
/usr/include/dolfin/mesh/dolfin_mesh.h