First stage ([pl. 33], a); the enclosing lines (1, 2) are drawn around the rim of the vessel. These are immediately followed by the three lines (3 to 5) which form the outlines of the five spirals composing the design. The proportions of the figures were determined by constantly watching the position of the first spiral as the bowl was turned counterclockwise.
Second stage ([pl. 33], b); the outlines of the details (lines 6 to 17) are drawn on each spiral in turn.
Third stage ([pl. 33], c); the outlining is completed by adding to each spiral a horizontal triangle at the base of the curve. It is interesting to note that line 18, the first of the group 18 to 21, was the first one drawn, although it was entirely detached at that time from the main figure.
Fourth stage ([pl. 33], d); the filling of areas is begun by painting the four small triangles on the upward curve of the spiral (areas I to IV). The order in which they are filled is apt to vary with the different spirals.
Fifth stage ([pl. 33], e); the large triangle at the base of the spiral (area V) is filled with black pigment.
Sixth stage ([pl. 33], f); the triangle at the bottom (area VI) is filled in each unit.
Seventh stage ([pl. 33], g); this consists in placing a series of dots along the median line of the leaf-shaped area in the base of the spiral. In the various spirals these dots vary in number from eight to ten.
Eighth stage ([pl. 33], h); the design is completed by filling the red areas (VIII and IX). In the first spiral so treated, area VIII was filled first, but in all the others area IX preceded area VIII.
The base of each spiral is four and one-half inches long. The width of the design is three inches.
Drawing No. 4 ([pl. 34]); original by Maximiliana Martinez. This rosette was placed in the interior bottom of a small constricted-mouthed bowl of red ware. A cloud-design which was painted on the rim of the same bowl is described and illustrated in fig. 6.