116 BUREAU OF AMERICAN ETHNOLOGY [Bull. 177 
Paste: On Mabaruma Plain and Hosororo Plain. 
Surraces: Except for the slip, the surfaces are typical of the plain pottery types. 
Slip: White slip ranges in thickness from paper thin to 0.5 mm. On a few 
sherds the slipped surface is so thick that crackle lines developed during 
firing. 
ForM: Bowls with incurving sidewalls and a slightly constricted mouth, or 
open bowls with outsloping sidewalls, direct rim, rounded lip. Mouth diameter 
14-26 cm. A few body sherds with slipped exteriors suggest by their curva- 
ture that they are from globular-bodied jars with diameters 24-28 em. 
Decoration : Two sherds have incised lines cut into the white slip; 1 sherd from 
Site N-13 has traces of red paint on the white slip as if a painted design 
once existed. 
UNCLASSIFIED DECORATED 
Occasional sherds from Mabaruma Phase sites exhibit unusual forms of decora- 
tion by brushing, incision, modeling, or punctation. These have the following 
characteristics: 
Brushed: Five sherds from N-18 have the exterior surface brushed with a bundle 
of twigs. The paste has a gray core with coarse sand temper particles; sur- 
faces brown. The only rim sherd is from a bowl with curving sidewalls, a 
nearly vertical, direct rim and a mouth diameter of 20 cm. The brushings 
overlap on a few sherds suggesting that the application was random rather 
than parallel, horizontal, or vertical. 
Incised: One sherd from N-20 with fine sand temper, dark reddish brown sur- 
faces, smooth and even exterior and interior, has deep, V-shaped incisions 
cut into the exterior in parallel diagonal lines just below the rim. Sherd 
is a rim of a globular jar with a short vertical neck and a constricted mouth 
32 cm. in diameter. 
Modeled: Four sherds from N-12 and one from N-13 have peculiar modeled 
applique that could not be classified as Akawabi Incised and Modeled. Several 
are small adornos, measuring 1 cm. wide and 8 mm. high, with eyes punched 
in them so that they suggest bird heads. These are placed along the rim of 
small bowls with everted lips. The other examples are nubbins applied to the 
exterior wall surface of small bowls apparently as a small face, or zigzag 
applique probably from parts of a zoomorphic or anthropomorphic figure. 
Three of the sherd fragments are on paste of Koberimo Plain and one on 
Mabaruma Plain. 
Punctate: A large number of sherds from N-13, cut 1, levels 0-15 and 15-30 
cm. are from the same vessel. The fragments were restored to form an open 
bowl with a direct rim and flattened lip. An irregular row of punctates and 
an occasional nubbin are placed 5-8 mm. on the average below the rim. Paste 
is orange with coarse sand temper; surfaces are fairly even. Mouth diameter 
22 cm. 
TRADE BHERDS OF KORIABO PHASE ORIGIN 
Certain Mabaruma Phase sites produced sherds of Koriabo Phase 
pottery types from vessels acquired by trade. Since the Mabaruma 
Phase pottery is better made and more elaborately decorated, the 
major flow of trade was in the opposite direction (see pp. 121, 139-141). 
The detailed pottery type descriptions can be found under the Koriabo 
Phase (pp. 180-133). Twenty-eight trade sherds occur in eight 
sites and represent one plain and one decorated type (pl. 36, a-e): 
