diff --git a/source/MetaTheories.mmt b/source/MetaTheories.mmt
index c9dceb29975ec1fd9be2cc56f96ac062cab07657..c405bff63420774e936d4ee2c2e468d21afcc0c9 100644
--- a/source/MetaTheories.mmt
+++ b/source/MetaTheories.mmt
@@ -379,8 +379,8 @@ theory CylinderType =
   include ?FrameITBasics ❙
 
   cylinderType : type ❘ # Cylinder ❙
-  // takes a midpoint, a point on the edge of the base-circle plane, as well as a point in the base-circle plane, and a point directly above the midpoint  ❙
-  cylinderCons : point ⟶ point ⟶ point ⟶ point ⟶ Cylinder ❘ # CylinderCons 1 2 3 4 ❙
+  // takes a midpoint, a point on the edge of the base-circle plane and a point directly above the midpoint  ❙
+  cylinderCons : point ⟶ point ⟶ point ⟶ Cylinder ❘ # CylinderCons 1 2 3 ❙
 ❚
 
 theory FrameITTheories =
diff --git a/source/Scrolls/CylinderScroll.mmt b/source/Scrolls/CylinderScroll.mmt
index 20149f58c95f9f3d458463da648955492ce4ebfa..e78d12a4e6bb54e8c09f058bdfc6f3398bea3813 100644
--- a/source/Scrolls/CylinderScroll.mmt
+++ b/source/Scrolls/CylinderScroll.mmt
@@ -15,10 +15,6 @@ theory CylinderScroll =
          ❘ meta ?MetaAnnotations?label "E"
          ❘ meta ?MetaAnnotations?description "The point on the edge of the bottom-circle-plane"
         ❙
-        P: point
-         ❘ meta ?MetaAnnotations?label "P"
-         ❘ meta ?MetaAnnotations?description "A point in the bottom-circle-plane"
-        ❙
         T: point
          ❘ meta ?MetaAnnotations?label "T"
          ❘ meta ?MetaAnnotations?description "The point directly above the point M"
@@ -32,7 +28,7 @@ theory CylinderScroll =
         meta ?MetaAnnotations?label "Cylinder" ❙
         meta ?MetaAnnotations?description s"Given four points: Three points that form the bottom-plane and one directly above this scroll constructs a cylinder" ❙
         ConstructedCylinder: Cylinder
-                ❘ = ( CylinderCons M E P T )
+                ❘ = ( CylinderCons M E T )
                 ❘ meta ?MetaAnnotations?label s"Cylinder"
                 ❘ meta ?MetaAnnotations?description s"The constructed Cylinder."
         ❙