The Papys Bayou Diagonal-Incised type is a Late Woodland pottery type from Central Gulf Coast and Manatee regions. The type shares similar definition, ware characteristics, geographical range, and chronological position to Papys Bayou Plain. The type also shares similar decoration techniques as Carrabelle Incised.

As described by Willey 1949:443:

Definition as a type: Definition as a type: Central Gulf Coast and Manatee regions

Ware characteristics: Indistinguishable from the soft gry or buff Biscayne or St. Johns ware. It is temperless, scratches with fingernail, and is 7 to 8 mm. thick. Surfaces usually polished.

Decoration:

Technique: Medium and fine incised lines on soft, unfired surfaces.

Design: Parallel incised lines placed vertically or diagonally on the vessel (fig. 42, f). Arrangement in a simple row, herringbone fashion, or nested triangles. There is a variation of the latter where alternate triangles are filled with horizontally placed lines. The decoration is often set off, above and below, by an incised line. The execution is often less expert than with Weeden Island Incised. (Pl. 29, b-f; pl. 33, a-e)

Distribution: Usually is confined to a band beneath the rim (upper one-third of the vessel) on the exterior surface. Sometimes, on beaker forms, it extends from rim to base.

Form: Large jar with folded rim only definite shape evidence.

Geographical range and chronological position: Central Coast and Manatee region. Also extends eastward into peninsular Florida as a minority type. Probably both Weeden Island I and II, but more common in the later period.