Tela chorioidea that lines the third ventricle[ZFA]. The part of the choroid plexus in relation to the body of the ventricle forms the vascular fringed margin of a triangular process of pia mater, named the tela chorioidea of the third ventricle, and projects from under cover of the lateral edge of the fornix. Blood is supplied by branches from the superior cerebellar artery[WP]. [ http://zfin.org/curator http://en.wikipedia.org/wiki/Tela_chorioidea_of_third_ventricle ]