WOODWORTH: GEOLOGICAL EXPEDITION TO BRAZIL AND CHILE. 133 
The hammer-stones are of a simple, world-wide type, slightly pitted 
on two sides where held between the thumb and fingers. The smooth- 
ing-stones are from two to three inches in length, and show on one or 
more sides evidences of rubbing and polishing. They were in all 
probability used in the manufacture of pottery, for smoothing the 
irregularities of the surface, both inside and out. The celt is of basalt, 
having a length of a little over six inches, with a width at the cutting 
edge of two and a quarter inches, and tapering somewhat toward the 
butt. One side of the implement shows somewhat greater convexity 
than the other and the entire surface was finished by grinding. 
The pottery sherds collected represent four somewhat different 
types. The first of these is a smooth, reddish ware, undecorated, 
and with a thickness of three eighths of an inch. It was apparently 
used for bowl-shaped vessels of rather small size. A second type is a 
very coarse, red ware, from one half to five eighths of an inch in 
thickness. The broken quartz and gravel used for tempering is 
extremely coarse. The surface of the vessels was covered with thumb- 
prints, often of large size, where the coils had been pressed together 
in the process of manufacture. The vessels were probably of large 
size. A third type of sherd shows a heavy and rather coarse gray 
ware, the surface covered by a buff or yellowish slip. This ware is 
nearly an inch in thickness, and the smoothed surface is decorated by 
painted designs in red. The figures are rectilinear, and seem to be 
aigzags and grecques. These vessels also must have been of large 
‘size. A single sherd also with painted decoration but of much thinner 
ware, and evidently a fragment of a small bowl, with decoration 
‘consisting of cross-hatching around the margin only, may be regarded 
as related to the thick, heavy ware in type. One other type is repre- 
sented by a sherd of dark gray ware, very hard burned. In thickness 
it is similar to the smooth red ware, but the surface is decorated by 
parallel rows of thumb-nail impressions. 
The character of the sherds would seem to indicate that the site 
was one belonging to Indians of the Guarani group of the Tupi. These 
Indians are known to have occupied the region in this immediate 
vicinity at the period of the earliest European contact, and sherds 
resembling the second and third types.here described, have been found 
widely throughout this coastal region as well as over large areas of 
Uruguay and along the lower Parana. 
