and within the Arroyo Group, a bit to the south of the mounds shown,
are others, of minor size, which, for lack of time, could not be inves-
tigated, even superficially, and are, for that reason, omitted from the
map.

Excavations from which pottery and figurines were taken may be
summarized as follows:

During the excavation of the Cabeza Colosal, sherds began to appear
at a depth of about half a meter; sandy Coarse Red ware and Polished
Black ware predominating. All the material, however, showed signs
of extreme attrition, and when it was realized that this soil had been
considerably disturbed on a number of previous occasions, it was
decided to ignore this material in the present study. Two heads and
one torso of characteristic Tres Zapotes figurines were found in the

MAP 4. -- West-east section through Mound E, Cabeza Group.

course of the excavation. A broad trench run from the Cabeza north-
ward nearly to Mound A proved completely sterile.

The structure of this mound is revealed in the longitudinal section
shown by map 4. Five steps, slightly curved from side to side, formed
a stairway almost 8 m. in width, leading up the west slope of what
must have been the primary mound. The top of the primary mound
is indicated by a floor of red clay, which is extended as a ramp as
far as the top step of the stairway. The sandstone slabs shown in
the excavation over the stairway apparently were part of the facing
of a secondary mound, to which was added still another layer, bringing
the mound nearly to its present height.

In this excavation sherds began to appear at a depth of 25 cm., the
same Coarse Red ware and Polished Black ware which had been found
around the Cabeza predominating, but they were not at all numerous.
Mixed with the sherds were traces of charcoal and fragments of deer

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