100 BUREAU OF AMERICAN ETHNOLOGY [Bull. 177 
B. Flat pedestal, thickened, usually 1.0-1.3 em., joining the body wall 
at a 80- to 40-degree angle, diameter 6-10 cm. (fig. 39, B; pl. 24, g). 
C. Annular, with the cross section of the annular foot ranging from tri- 
angular, to rounded, to rectanguloid with rounded edges, to taper- 
ing (fig. 39, C; pl. 24, e, f). Vertical height 1.5-2.0 cm.; central 
portion of the base either unthickened or slightly thickened with a 
convex or flat center ranging from 6 to 15 mm. thick. Diameter 
of the annular base 7-12 cm., majority 10 cm. 
Major vessel shapes reconstructed from sherds: 
1. Open bowls with outslanting sides, direct rim and typically a rounded 
lip, but sometimes slightly tapered or slightly thickened. Side 
walls vary from almost vertical to outslanting as much as 50 
degrees from the vertical. Mouth diameter 18-30 cm. (fig. 39-1). 
2. Bowls with vertical to incurving walls, usually a direct rim, but 
sometimes slightly tapered or thickened; rounded lip. On those 
bowls with vertical walls the mouth and body diameter are the 
same, ranging from 20 to 24 em., while bowls with incurved walls 
have a constricted mouth opening of 14-20 em. with the body 
diameter 20 to 26 cm. (fig. 39-2; pl. 24, c). 
3. Bowls with outcurving sides and externally thickened rims. The 
thickened rim ranges from an extra coil added to the exterior 
making the rim 1.0-1.5 em. in cross section to a slight pinching out 
of the side wall to form a thin ridge. Rim top typically horizontal 
and coneave. Mouth diameter 12-26 cm. (fig. 39-3; pl. 24, Bb, d). 
. Jars with constricted mouth, sharply everted rim and rounded lip. 
The short rim joins the interior of the body wall at a 90- to 
110-degree angle, from which it rises 1.0-2.5 em. Usually the rim 
is no thicker in cross section than the body wall but occasionally 
it is slightly thickened to as much as 1.5 ecm. Curvature of side 
walls suggests the body is either globular or carinated. Mouth 
diameter 20—28 cm. (fig. 89-4; pl. 24, a). 
5. Jars or bowls with externally thickened, broad flanged rim and 
rounded or tapered lip. These rims are formed by the addition 
of a wide coil to the exterior of the body wall. Upper rim surface 
slopes outward and is typically convex, 2.2-3.5 em. wide. Mouth 
diameter 22-32 em. (fig. 39-5). 
Rare vessel shapes reconstructed from sherds: 
1. Small bowls with slightly incurving walls and exteriorly thickened 
rim, ranging from a small applique rib to a slight ridge making 
the rim 8-15 mm. thick in cross section. Mouth diameter 14-18 em. 
2. Griddles. Flat, circular, with direct rim and rounded lip. Diam- 
eter 28 cm. ; thickness 1.5-1.8 em. 
TEMPORAL DIFFERENCES WITHIN THE TYPE: Common Form 5 is popular in the 
middle to earlier part of the sequence but absent later. Among the three base 
shapes both Form 1 (flat) and Form 2 (flat pedestal) are late, while Form 3 
(annular) occurs only in the lower (early) part of the sequence (Appendix, 
table 8). 
CHRONOLOGICAL POSITION OF THE TYPE: Hosororo Plain increases in frequency 
from the early part of the Mabaruma Phase sequence until it becomes one of 
the most popular types in the late part of the Phase (fig. 48). 
a 
