The best-known mesolithic sites from Brittany are the cemeteries on the islands of Hoëdic (10 graves) and Téviec (9 graves) in Morbihan. The collective graves are placed in shell middens without any particular order. Some graves show evidence of postmortal manipulations of the bones. There are single burials and empty graves (cenotaphs) as well. The graves are covered with stones, a hearth or antlers forming a sort of dome. Rich funeral gifts, flint tools, engraved bones, shell ornaments and ochre demonstrate the affluence of these hunter-gatherers, or rather fisher-gatherers. Certain shells are sex-specific.