diff --git a/surf/geometry.py b/surf/geometry.py
index 5eeb07c..90de39f 100644
--- a/surf/geometry.py
+++ b/surf/geometry.py
@@ -133,10 +133,10 @@ class PolygonMesh(object):
       edges, and faces)
     '''
 
-    def __init__(self, *args, **kwargs):
-        self.vertices = [Vertex(*v) for v in kwargs['vertices']]
-        self.edges = kwargs['edges']
-        self.faces = kwargs['faces']
+    def __init__(self, vertices, faces, edges=None, **kwargs):
+        self.vertices = [Vertex(*v) for v in vertices]
+        self.faces = faces
+        self.edges = edges
 
         # the strategy for the following members involves lazy-instantiating
         # them if they weren't passing them in:
diff --git a/surf/subd/cc.py b/surf/subd/cc.py
index a3fdaaf..befbe33 100644
--- a/surf/subd/cc.py
+++ b/surf/subd/cc.py
@@ -93,6 +93,7 @@ if __name__ == '__main__':
     from surf.subd.cc import refine
     input_file_name = sys.argv[1]
     cube = json.load(open(input_file_name, 'r'))
+    import pdb; pdb.set_trace() 
     p = PolygonMesh(**cube)
     q = refine(p)
     print q