114 BUREAU OF AMERICAN ETHNOLOGY [Bull, 177 
C. Annular, with the cross section of the annular foot ranging from 
triangular to rectanguloid with rounded edges; vertical height 
1.0-1.5 em.; diameter 7-8 cm. (fig. 46, C; pl. 30, c). 
D. Rounded, slightly thickened (fig. 46, D). 
Major vessel shapes reconstructed from sherds: 
1. Open bowls with outslanting sides, direct or tapered rim with 
rounded lip. Mouth diameter 10-30 cm. (fig. 46-1). 
2. Bowls or jars with vertical to incurving sidewalls, direct rim and 
rounded, flattened, or tapered lip. Mouth diameter 10-36 cm. 
(fig. 46-2 ; pl. 30, a, d). 
3. Large open bowls with externally thickened, broad, flanged rim 
with rounded or tapered lip. The flattened top of the flange meas- 
ures 1.8-3.3 cm. wide with the maximum thickness of the cross 
section 1.2-1.8 em. Rim diameter 18-32 cm. The body is usually 
rounded, but a few are carinated (fig. 46-3). 
4. Bowls with slightly outcurving to slightly incurving walls, sharply 
everted rim and rounded lip. The flat, insloping top of the rim 
is 1.2-2.0 cm. wide. Mouth diameter is 14-28 cm. (fig. 46-4; pl. 
30, b, e). 
5. Griddles. Large, flat, circular with the basal side poorly smoothed 
as compared to the upper surface. Rim either direct, slightly 
thickened or upturned, with concave or rounded lip. Thickness 
1.2-2.5 cm., diameter 28-50 em. (fig. 46-5). 
6. Large globular jars with restricted mouth and exteriorly thickened 
rim, made by adding a thick, triangular, or rectangular coil. The 
rim varies in cross section from circular to triangular in outline 
and 1-4 em. in thickness. Mouth 20-36 cm. (fig. 46-6). 
Less common vessel shapes reconstructed from sherds: 
1. Short-necked jars, probably with large globular bodies. The necks 
are vertical, slightly insloping or outsloping, ranging in length 
3.5-6.0 em.; the rim is slightly thickened or everted. Mouth diam- 
eter 20-32 cm.; body diameter at least 10-15 cm. greater than the 
mouth. 
TEMPORAL DIFFERENCES WITHIN THE TYPE: Vessel Form 38 occurs only in the 
early (lower) to middle part of the Mabaruma Phase sequence. Vessel Form 
4 has a similar history. Less Common Form 1 is restricted to the middle 
part of the sequence. The most significant trend in form is the occurrence of 
the annular base only in the lower (early) part of the sequence (Appendix, 
table 14). 
CHRONOLOGICAL POSITION OF THE TYPE: Mabaruma Plain is the dominant pottery 
type in the early part of the Mabaruma Phase, where it reaches a maximum 
frequency of 65 percent. Its history is one of gradual decline, but it continues 
to be present until the end of the Phase (fig. 48). 
UNCLASSIFIED PLAIN 
Two sherds from N-13 and five sherds from N-21 all show the same char- 
acteristics. The paste is gray tan to dark gray and full of holes. Most of the 
surfaces are eroded away. At first it seemed possible that the paste had been 
shell tempered and the temper had leached out; however, closer examination 
did not verify this. The clay probably contained stray bits of organic matter, 
was not well kneaded and as a result an excess number of air pockets developed. 
Body wall thickness 6-13 mm. ; body diameter 26 and 28 cm. 
