diff --git a/cadquery/selectors.py b/cadquery/selectors.py
index 0fe1f76..14fdce2 100644
--- a/cadquery/selectors.py
+++ b/cadquery/selectors.py
@@ -325,29 +325,12 @@ class DirectionMinMaxSelector(Selector):
 
 class DirectionNthSelector(ParallelDirSelector):
     """
-        Selects objects closest or farthest in the specified direction
-        Used for faces, points, and edges
+        Selects nth object parallel (or normal) to the specified direction
+        Used for faces and edges
 
         Applicability:
-            All object types. for a vertex, its point is used. for all other kinds
-            of objects, the center of mass of the object is used.
-
-        You can use the string shortcuts >(X|Y|Z) or <(X|Y|Z) if you want to
-        select based on a cardinal direction.
-
-        For example this::
-
-            CQ(aCube).faces ( DirectionMinMaxSelector((0,0,1),True )
-
-        Means to select the face having the center of mass farthest in the positive z direction,
-        and is the same as:
-
-            CQ(aCube).faces( ">Z" )
-
-        Future Enhancements:
-            provide a nicer way to select in arbitrary directions. IE, a bit more code could
-            allow '>(0,0,1)' to work.
-
+            Linear Edges
+            Planar Faces
     """
     def __init__(self, vector, n, directionMax=True, tolerance=0.0001):
         self.direction = vector
diff --git a/tests/TestCQSelectors.py b/tests/TestCQSelectors.py
index 7843b12..05f9314 100644
--- a/tests/TestCQSelectors.py
+++ b/tests/TestCQSelectors.py
@@ -174,6 +174,10 @@ class TestCQSelectors(BaseTest):
         val = c.faces(selectors.DirectionNthSelector(Vector(1,0,0),1)).val()
         self.assertAlmostEqual(val.Center().x,-1.5)
         
+        #2nd face with inversed selection vector
+        val = c.faces(selectors.DirectionNthSelector(Vector(-1,0,0),1)).val()
+        self.assertAlmostEqual(val.Center().x,1.5)
+        
         #2nd last face
         val = c.faces(selectors.DirectionNthSelector(Vector(1,0,0),-2)).val()
         self.assertAlmostEqual(val.Center().x,1.5)
@@ -182,7 +186,7 @@ class TestCQSelectors(BaseTest):
         val = c.faces(selectors.DirectionNthSelector(Vector(1,0,0),-1)).val()
         self.assertAlmostEqual(val.Center().x,2.5)
         
-        #check if the selected face if normal to given Vector
+        #check if the selected face if normal to the specified Vector
         self.assertAlmostEqual(val.normalAt().cross(Vector(1,0,0)).Length,0.0)
         
     def testNearestTo(self):