Primitive, light, small bowl-shaped boat with a wattle frame of grasses, reeds, or saplings covered with hides. They were first known in the Iron Age and are still used in Wales and along coastal Ireland, usually with a canvas and tar covering. The term also refers to an Old English boat of wickerwork covered with hides. Native Americans used the similar bullboat, covered with buffalo hides, on the Missouri River, and the corita, often sealed with bitumen, on the Colorado.