Sentence:  The canoes that are in common use on the lake are of the most primitive and unstable type. They simply consist of a semi-cylinder, hollowed out of a tree stem, with the ends filled up with mud and grass. These canoes are called <WSD>"blotto</WSD>" or "ballotto" by the natives. ... They are of every size, from the child's <WSD>blotto</WSD> of ten or fifteen feet in length to the fisherman's craft of fifty. 
Meaning of the word marked with <WSD> tags:  On Sulawesi: a hollowed-out tree trunk used as a boat.