eae ARCHEOLOGY IN BRITISH GUIANA 229 
C. Rounded and unthickened or slightly thickened. One example has a 
series of perforations 3 mm. in diameter clustered in the center 
(fig. 96, C). 
D. Annular, outflaring, with rounded lower edge. Height 1-2 cm.; di- 
ameter at lower edge 6-12 cm. (fig. 96, D ; pl. 47, f). 
Major vessel shapes reconstructed from sherds: In the absence of any com- 
plete or restorable vessels of Yoché Plain, the analysis of form had to be 
made from rims, bases, and diagnostic body sherds. Coincidences in the 
distribution of rim and base forms give clues to the possible association 
(Appendix, table 35). This evidence suggests 7 major vessel shapes: 
1. Rounded, shallow bowls, with walls thickened on the interior 1.2—2.5 
em. below the lip, and tapering toward the lip, producing a flat 
band around the rim interior. Rounded or pointed lip. Rim 
diameter 16-28 cm. The temporal distribution of this form paral- 
lels that of the annular base, suggesting that they belong to the 
same vessel shape (fig. 96-1). 
2. Shallow to deep bowls with outslanting or upcurving walls and 
direct rim with rounded, flattened or pointed lip. Diameter 12-44 
em.; majority 14-32 cm. (fig. 96-2). 
8. Bowls with upslanting to nearly vertical walls. Rims are everted or 
exteriorly thickened, often producing a flat rim top. The lip is 
rounded. Rim diameter 8-44 cm., majority 20-30 cm. (fig. 96-3). 
4. Globular jars with short everted neck or exteriorly thickened rim, 
rounded lip. The thickened and everted forms both occur through- 
out the seriated sequence, suggesting they are variants of a poorly 
standardized rim treatment. Rim diameter 10-38 cm.; majority 
18-30 em. (fig. 96-4). 
5. Globular jars with direct rim incurving to rounded or beveled lip. 
Rim diameter 10-30 cm. (fig. 96-5). 
6. Deep bowls or jars with concave or outcurving upper wall, everted 
rim and rounded, flattened, or pointed lip. The lower edge of one 
rim sherd extends down to a mild carination, indicating that body 
sherds with this form are associated with these rims. Rim diam- 
eter is 6-42 cm., majority 18-28 cm. (fig. 96-6). 
7. Large, flat, circular griddles, with no standardized rim treatment. 
Variations include an upturned edge, interior thickening, expand- 
ing thickness at the rim, and direct rim. Thickness 1.1-2.8 em., 
rim diameter 32-52 cm. (fig. 96-7; pl. 47, h). 
OCCASIONAL DECORATION (pl. 47) : 
Applique: Ribs or small nubbins occur just below the rim on Form 2, or 
on body sherds. Height of projection is 3-5 mm. Nubbins are 1.0-1.5 
em. in diameter. Examples are rare. 
Nicks: Rims of Form 2 occasionally have a row of small nicks along the lip, 
1-5 mm. wide, 3-5 mm. deep and irregularly spaced 2-8 mm. apart. Ex- 
amples occur scattered throughout the entire seriated sequence. 
Unsmoothed coils: A few body sherds and rims of Form 4 and Form 5 have 
unsmoothed coils on the exterior, extending downward from the rim 
(pl. 47, a—-d). 
Fingertip impressions: A few griddles have a row of decorative fingertip 
impressions along the outer rim edge (pl. 47, e). 
TEMPORAL DIFFERENCES WITHIN THE TYPE: Vessel Form 1 is limited to the lower 
half of the sequence, and Form 3 to the upper two-thirds. Form 5 appears 
to be absent from the latest sites. Base Form D is characteristic of the lower 
