Two new genera,Ciliscutellum and Sangzhi-scutellum,were collected from the Lower Silurianof western Hunan by Y.R.Liu and the writerrespectively.Ciliscutellum was found in associa-tion with Glyptograptus sp.,Monograptus sp.andophiuroids from a horizon consisting of dark greyfine sandstone and yellowish green shale,beneath which Pristiograptus,Monograptus,Rastrites and Climacograpius have been found,while Sangzhis-cutellum was based on Meitanillaenus flabellifor-me Liu,1982.Description of new genera and speciesFamily Thysanopeltidae Hawle et Corda,1847Ciliscutellum gen.nov.Diagnosis:Dorsal shield elliptical in outline.Cephalon semicircular excluding the genal spines,moderately convex.Cranidium subquadrate in